And punks like you threaten the peaceable community.
Why don't you just tell us how having the serial number and registered owner of a firearm on file is going to make the firearm any less lethal, especially if it is stolen from that owner?
Seriously, counselor, of all specious arguments ever produced, that must be the most ludicrous.
The firearm will remain what it is, a device. It will be no more nor less capable of harm than the hand which wields it, regardless of what is written where. Having that written down will not make the firearm safer from thieves, although that might be used to propagate even more rules to encumber a basic Right.
Therefore, those who wish to obtain firearms for nefarious purposes will continue to do so, even if they have to manufacture them. They will find a way. The sick, demented, and tortured souls who determine they want to kill large numbers of people will find a way, be it a rifle, a rental truck full of homemade explosives, a means of creating panic in a crowd (which can injure and kill as well), or the well-placed contents of a gas can and a match. Some of those individuals aren't being stopped using the present methodologies, but that isn't for lack of ability to use those tools effectively enough to do so, instead the tools are there, rusting on the workbench.
Nothing points this out like the failures in law enforcement to follow up on the myriad complaints about the school shooter in Florida.
In the meantime, the law abiding shooting community continues to daily mitigate the effects of and prevent crime in other venues where there is no LEO monopoly on crime prevention and mitigation. Yet, like a typical Liberal, you would go after the rights and capabilities of those who are effective on a daily basis, even though they receive no compensation for their efforts, and would encumber them further, making them less effective, rather than >ahem< encourage the professionals to do a better job.
One need look no further than the philosophical core of Liberal "equality" to understand that, once again, that which is best is to be reduced to the level of the worst so all can be 'equal', rather than place demands on those who failed.
Either way, the genie is well out of the bottle. Americans are not going to surrender their firearms. Americans will transfer, manufacture (as needed), and make anything they need to keep them. Any government which defies its own rules to stop that has lost its legitimacy, to wit: it will no longer derive its just powers from the consent of the governed.
In Canada, the long gun registration scheme that came out of Ottawa was largely ignored. No battles in the streets, just overwhelming noncompliance. Finally, after outrageous cost overruns and obvious inefectiveness, the policy was abandoned.
Anticipate the same here, and it is entirely likely that any attempt to be overweening by government will not end well, especially for the careers of the politicians and their minions who attempt to enact or enforce such policies.