This is silly - what gun control do you propose would prevent this sort of thing - that doesn't already exist?? I grew up with my father being a federally licensed firearm dealer. We knew the rules AND the consequences at all times. The guns (and oh boy were there LOTS of them) were locked up in a safe and we never had an issue. Taking one bad parenting example and using it as an excuse to "control" guns is short-sighted at the absolute best. When I was 15, I stopped a violent home invasion at my parents' house with a 12 gauge (did not have to shoot, thankfully, just cycled the action.)
What we need is CRIMINAL control and gun EDUCATION. Currently, we don't have the latter. (And telling kids "guns are bad mmkay, just run away" is NOT education!)
Feel free to not exercise your right to own a gun - but DO NOT take mine away because you don't like it. The founding fathers put "shall not be infringed" in that amendment for a very valid reason.