And the question is “How can citizens best protect themselves from criminals and aspiring tyrants?”
Some wacky nut with a Columbine fetish went to a gun store and had her background checked and bought a pump action shotgun - not some scary pseudo-assault rifle but a run-of-the-mill scattergun. Luckily people saw her scary social media posts and realized she might be a threat; she never got to a school.
She wasn't a criminal and she was not on a mental health list, and she was background checked. But that did not stop the disarmament detachment from going into their usual freak out mode. What this situation does is show the truth - they aren't really out for "common sense gun laws" - they are out for your guns. After all, school gun violence is way down, but that doesn't matter to them. Their goal is you going from free, armed citizen to obedient, disarmed serfs.