Rights? There would be none. Anyone who thinks this would start and end at the purchase of guns is looking at naive in the rear view mirror.

It is already the case that many who should seek help do not. How many more would not if such a list were made? And think about it -- where would they put the dividing line? What of misdiagnoses? Would it include those who actually do not have an MI but simply had a s***storm occur in their life that threw them into a one time depressive episode? Children? Axis II? ADD? (Databases already exist of those filling their schedule II meds, btw.) I can't focus enough (w/o head-spinning panic -- and still screwing it up) to balance my checkbook or to fill out even 3 money orders at the same time. Mastermind a criminal plot? As if!!! One of the "joyous" aspects of my OCD is worrying that I might have done something wrong even when I clearly didn't. And we're talking really small stuff. Did I mis-estimate a number on a form? Was there a rule I didn't know about? I'll get back into a car like 3 times after parallel parking it to ensure that it is very very close to the curb, and not into any yellow etc, sure I will be ticketed otherwise. Hell, I obey "rules" that don't even exist for fear of getting in trouble(!) "You never know." It's not that I don't do things (even technically illegal things) --it's the point of being scrupulous to the point where breaking the number of laws both legal and moral that it would take at one time is utterly inconceivable.

And why on earth should doctors be given that kind of power? (Not saying it would be common, but...) It could so easily be be used simply because a doctor had a personal grudge with someone (especially in small towns). And they'd know damn well that there would be no personal repercussions. Sue them? Besides them being taken more seriously than you (and able to afford power lawyers), how does one prove they don't have something? Proving the non-existence of something is essentially impossible. It would also put every well-meaning doctor in a position where they dare not dx, knowing they could ruin someone's life.

Because again I say, and cannot possibly stress enough -- it would be unbelievably naive to think that if such a list existed it would not also end up being used in contexts way outside the realm of gun purchasing.

(Btw, I am most assuredly not an alarmist, conspiracy theorist or politically extreme. Just been on the planet for quite some time and seen plenty of the history of reality.)

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That one's easy. Take ignorance. Add media sensationalism.
I'd be hard-pressed to think of a single case of any other kind of medical condition they do that with (in regards to violence).

Same here. So it's not as if I have any vested interest in the issue of gun ownership.

(Sorry so long --even for me, lol. These kinds of things really fry my bacon.)