1- Felons: I very much don't want violent felons buying guns and, if they were locked up for life as they should be, this wouldn't be much an issue. OTOH I don't give a fig if some non-violent felon does or doesn't own a gun. Martha Stewart is a felon and probably could negatively impact more people by buying Sturm Ruger Co than by buying a ruger mini-14.
2- mentally ill: They should be on the NICS prohibited list.
3- non-resident aliens (can I call them NRAs 
) yeah fine.
4 & 5- OoP subjects & convicted abusers: no argument as long as they have due process; life without parole for the violent.
6- drug addicts: if they are judged as a danger to self or others they should be involuntarily held until medically cleared. I suggest not allowing gun shops to operate inside drug rehabs.
7- fugitives, subjects of indictments for violent crimes or pending charges such charges: sure, should be on the NICS list.
Making an NICS check available to current gun owners would do more to limit the folks who shouldn't have guns from getting them. Keeping the violent confined would fix more of the effects of crime on society than inventing new crimes.
"Could it be that they have bought into the dangerous and racist meme..." maybe or maybe they're engaging in a sport or hobby.
The simple fact is that guns are the subject of these types of restrictions because they are the most efficacious tool to select when planning a robbery or murder. They are also the most efficacious tool to use in your own self-defense which is principally why most law enforcement carry a gun. They are frequent targets of violent folks.
If guns were somehow removed from humanity altogether, another weapon would become "the most efficacious tool to..." and that isn't an argument to protect people from themselves.
The simple fact is that guns are simple tools. Those who can't see that are also simple tools...
...and they're being used by politicians who just want to be elected or reelected.
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