This is the exact same policy that kept Trayvon Martin in school after he had been caught robbing lockers and in possession f stolen jewelry, etc... Very easy for board members to make these policies and not see the unintended consequences of their actions.
Similarly, those calling for single access points for schools here may not have considered the ramifications of funneling hundreds or even a couple thousand students through that access point simultaneously as school starts or lets out, or worse yet, in an emergency. Even gophers have enough sense to have a back door.
My first High School (not in ND, needless to say) was only 1400 students, but all but one door had been chained and locked shut to limit access to the building during ongoing race riots, in direct and conspicuous violation of fire codes. That's when the bomb threats started coming in.
Despite that unrest (late '60s/early'70s), there were no mass shootings.
What changed, culturally? Both sides in that era had been raised in families and even schools where prayer started the day, along with The Pledge of Allegiance. Violence on television and even in the movies (movies were rated 'X' for violence, not just sexual content and profanity--the "TV MA" rating group today would have qualified) was not graphic, life was considered sacred, and every child was at least exposed to the idea of a God who would ultimately judge their actions. For those who would argue that there were no AR-15s around, I will only state that a M1 carbine was a popular rifle, lightweight, and came with 30 round magazines, too. IOW, while the tools were not so intimidating in appearance as today's black sporting rifles, they were just as capable at ranges inside 100 yards. But those who had exposure to firearms, had had so from fathers, uncles, and others who had been in or close to combat, be it WWII or Korea, or even WWI, men who were men of peace because they had been men at war. The concepts of Chivalry (OMG! SEXISM!) and Honor were still prized in a culture that believed all were equal in the eyes of God. And as for 'gun control', the Form 4473 was still new, and most guns in private hands had been purchased, often by mail order, without background checks, no NICS, no databases, only at the discretion of the seller, and military surplus arms were quite common. Some pre-NFA (1934) firearms were still floating around, just not so commonly seen. Mass shootings were still rare outside of warfare (why the St. Valentine's Day Massacre was such a headline-getter) and commonly linked to organized crime.
The idea of "senseless killing" was something fresh in the minds of those who had been in WWII; millions had died in the death camps and massacres in Europe and Asia, but not something which fit in in America. If you were going to risk the electric chair, the rope, the gas chamber, or the firing squad, you were going to have a solid reason for wanting someone dead. Just killing someone for no reason that you didn't know wasn't a consideration, much less women and children.
Since then, the Marxists in our society have been on a serious campaign to not only eliminate The Almighty from our zeitgeist, but to eliminate the concepts of chivalry, honor, integrity, and fundamental morality as well. Unfortunately, they have been wildly successful at sowing the seeds of that libertine self-destruction, and continue to do so to this day. More children, our own children, will never see the light of day, not at the hands of some enemy, but because of a slaughter proclaimed a 'right' to be free of the responsibility to raise them, something abdicated to the ministrations of a government interested in control of the masses, not the quality of the outcome.
What we are seeing is not the result of newer and more improved hardware--the tools of the infantryman in WWII were fully adequate to the task of taking lives, and doing so in large numbers and even from a distance--it is a result of a sickness imposed on our culture through media exposure to evil and the exclusion of the very universal concepts that made this country great.
If we truly want to "Make America Great Again" it is time to reconsider the road we are on.
We have people howling about school shootings, but this is just a symptom, not the malady.
In my youth the following were generally unthinkable:
Killing someone for no reason, especially a bunch of people.
Beating your wife/kid/dog/horse. The last three could be disciplined, but special stigma was attached to anyone who beat his wife (men did not strike ladies), or who excessively harmed the last three. Corporal punishment was commonplace, but limited in intensity, and administered with a dispassionate, often reluctant mien (as opposed to a mean mien).
Torture of animals or people.
Rape (still had the death penalty as a possibility when I was a kid, and that isn't counting what would happen if the family caught the perp first).
Abortion.
Drugs for recreational use, especially hard drugs, IV drugs.
(The big three culturally acceptable drugs were coffee, tobacco, and alcohol, in moderation, and some folks didn't use any of them.)
Letting anyone come in your home and take your children under any pretense.
Letting anyone routinely monitor your private communications, be they business or personal.
Harming a child (not disciplining, not corporal punishment, but serious physical harm or mental torture), or, for that matter, mistreating an animal. Varmints and sick/injured animals were dispatched promptly.
Hitting a woman, except in the most unusual circumstance of self-defense.
Placing the lives of wild animals above the lives or livelihoods of people, but not to include killing them for no reason.
Wasting any resource (a holdover from the Great Depression, and even leaner times before that).
Stealing.
Cussing in public, but especially in front of women (the 'mixed company' taboo--in front of children was considered socially unacceptable as well).
Sexual Promiscuity or Homosexuality. (We knew of it, it existed, but it was not in evidence, much less pouring out of television sets into living rooms across the country). Far from being celebrated, both were spoken of with derision and not in front of the children.
To not respect our elders. (This is a fundamental fabrication of the Marxists who want, ultimately, State control of children, in that it disrupts cultural continuity.
From the creation of the 'generation gap' to labeling each successive generation (or decade) as some letter or with a name to make people think there is no common and linking thread, but instead some sort of adversarial relationship between youth and those older, right down to modifying fundamental curricula to the point parents can't even help children with homework, is all designed to disrupt the ordinary cultural flow which binds a people together, and in this case, the conveyance of the concepts of Liberty, responsibility, and morality, which form the essence of our culture.
Leaving successive generations without a cultural rudder or a moral compass makes them vulnerable to exploitation, especially when the values which are to be summarily discarded are those which are the fundamental concepts of an entire republic and way of life.)
Sex education in any formal context before tenth grade health class. Puberty is distracting enough, but by focusing attention on sex at an early age, not only are children deprived of childhood, but taught to think of each other not in terms of person and personality, but as potential sexual partners first. This is exactly the opposite of the whole idea of not being 'sex objects' because it makes everyone one (or rejected as one) and takes the focus off of personal development and puts it on the rut. While there are those who proclaim it "liberating", in actuality, it is dehumanizing and takes the focus off of personality development and places it on more superficial objectification.
It isn't hard to see that many of the stated goals of those who would change our society (and have done so) are in direct conflict with other stated goals, but the end game in all this confusion is the destruction of the culture which stepped into two world wars and ended them, one which has survived its hard knocks, and come out on top. Keeping in mind that the Marxists and others who would 'rule the world' view their aims with the religious fervor many Americans used to view The Almighty with, there will be no lack of evil influence on our culture.
Had I been told in 1965 that the day would come when tobacco was all but banned, but marijuana was being asserted to be legal (as a government revenue generator) I would have scoffed at such dystopian fiction. After watching people in shock (from an event or injury) reach for a cigarette to help get a grip or find relief, and being subsequently told that there were no beneficial effects of tobacco (peripheral vasoconstrictor which offsets shock), I would have laughed. Yet here we are.
If I had been told that the promiscuity which populated Huxley's Brave New World would become reality, and more, that it would be celebrated in culture, song, and media, and proclaimed protected by law, even to ignore and foster the spread of a deadly disease, I would have scoffed, claiming that cooler heads would prevail.
If I had been told that language I never heard my parents use would become so commonplace as to pour from my TV, I would have dismissed the teller as 'nuts'.
And had I been told that this country would eventually rack up a body count of murdered babies that would exceed any nation's death camps of WWII or purges, I would have believed it impossible.
Yet, here we are.
And if someone wants to blame a piece of hardware for the lunatic actions of a person produced by such a culture, perhaps it is because it is easier to put a bandage on the boil than to admit the festering corruption that produced it. Our society has become gravely ill, and this shooter is just one symptom.
At every level, from mental health, to disciplinary, to communications between the school and LEOs, to the inaction of LEOs when the information was there, the system that claims if we just give up one more right it will be enough (this time, until the mechanisms in place fail again), failed to prevent this event.
Imposition of control from outside is no solution, only a band aid. Curing the cultural rot that has taken root is the only way to prevent such events in the future, to make them unthinkable acts. We are a long way from that, especially if we won't even diagnose the infection. It is the ultimate abdication of responsibility to blame the tool, rather than the person that wielded it, and the culture that produced that person.