I don't own a weapon: I would if it wasn't so hard to obtain a gun licence here - and I would ONLY use it (a) for target practice or (b) if my life or someone else's were in danger.
I know it's hard to believe but 99% of all the legal gun owners in America would also follow your A & B rule. It's that 1% of legal gun owners that causes the problems of legal gun ownership in America. Even though, almost all American Gun Violence is committed by illegal gun owners. Which becomes the problem because the gun restriction's only hit the legal owners.
I am very familiar with that case - because my parents and siblings were THERE that day! They passed him on the sidewalk as he was headed towards the tower with a trunk on a dolly. Later it was revealed that all his weapons and ammo were inside that trunk. They left the campus about 10 minutes before the shooting started.
wow... that must of been one hell of a scary story. I'd only bring this up because it happen almost 50 years ago.
I do think there is a society issue (but it's not because of too much violence in the movies or porn on the internet). Today the kids have this mentality that they are feeling cornered and worthless unless they do something that causes meaning to their lives. It's just that some 'kids' want a bigger bang - and that usually ends in murder.