Everyone's emotional responses seem to be based on the negligence of the teacher based on "what if" scenarios of a minor getting ahold of the firearm and shooting themselves or someone else. So here's one for ya:
"What if" someone unknowingly dropped their car keys next to the car and some kid picked them up and went for a "joy ride" and subsequently ran over someone. Should that vehicle's owner be prevented from driving or for that matter owning a car for the rest of their natural life?
The way I see it, there's no difference between my "what if" and all of everyone else's what if.