So we'll all be safe if we keep weapons out of the hands of the nutters eh?
You guys really believe that? This incident
Hoddle Street massacre - Wikipedia, the free encyclopedia was concocted by a bloke that had been examined twice by psyche's, once when he joined the army, and once again before he was accepted as a Staff Cadet (officer trainee) at RMC Duntroon in Jan 1987. I know, he was a former classmate of mine.
Unless you are suggesting that all members of the population get regularly examined by a psyche (annually? monthly?) you cannot say that otherwise rational people cannot flip out and do something lethal. The term "Going Postal" did not come from an escaped inmate of a mental asylum. The more lethal the device, the more serious the outcome.
So unless you are happy for the entire community to be regularly tested by a shrink, this 'plan' will not work. besides, this bloke:
http://www.google.com.au/url?sa=t&rc...vpv6lTK3CjuX8w
on the basis of this performance would probably be certified as paranoid or insane.