require microstamping for new guns;
Microstampng can be defeated with a small file, but to my knowledge is not available on any production firearms. In other words, you can have a gun, but it is made of unobtainium.
increase accountability for social media platforms;

(deep breath)

What are they gonna do, and who will get in trouble for posting something that just counters the narrative, rather than actually made a threat. What's to stop burner phones and sockpuppet accounts from overwhelming this? Monitor it and act on credible threats (investigate, and keep eyes on).
eliminate grandfathering of large capacity ammunition feeding devices;
How large is large? Thirty rounds is the standard AR magazine, some pistols have mags up to 15 rounds standard. Changing that throws off the weight and balance of the firearm. Nothing dumber than stuffing a placebo in the mag well, especially with a long, hot summer coming and a sketchy power grid.
But for the dumbest of the dumb ideas:
prohibit the purchase of body armor for anyone who is not engaged in an eligible profession
The most passive means of saving your life, cheaper than a rifle (and most quality handguns) is a set of level IIIa body armor. It is not impervious to everything, but can passively save a life even when no firearm is allowed. Soft level IIIa will stop most handgun bullets, even if the impact will leave a mark.
Body armor has no offensive capability, so once again the overlords want to make people more vulnerable, not less. As far as assessing threats to a person's person, that is not something some faceless bureaucrat should be deciding based on occupation. If the neighbor is raving drunk yelling "I'ma gonna shoot your ...", you should be able to at least take this step to protect yourself from future events. The stuff should be sold, off the rack in malls, for Pete's sake, not withheld for the politicians and bankers and their security staff (not counting the police). It's a frigging
garment, not a weapon.
/rant...
(just more reasons why there are a few places I would never live.)