Didn't the Clackamas whack job pinch an AR15 from a roommate or buddy and then "go shopping" after missing an airline flight?
None of these jack-ass proposals say anything about weapon security, they mostly target other people's gun rights of possession and carry.
I don't really see how anybody's weird, schizophrenic kid should have anything to do with my firearms. 
Sure, they're afflicted with pitiful neurochemistry and misfortune,
but there are better ways of restraining them from legally or illegally obtained weapons other than restricting all weapons.
These sanctimonious outbursts are always about pushing other people around because of frustration with the intractable.
Look at the man-child holding the rifle. Ban that guy.  And his mother.