Getting rid of violent video games won't really help, you will also have to get rid of violent tv programs and movies so everything is family friendly. You would also have to do something to stem the nature aggressive/war like nature of humans in general also.
Good point. In the movie "Serenity" (TV show "Firefly") they tried to get rid of aggression in humans to create a utopia. Turns out it didn't work, and everyone turned into very aggressive zombies.
Oh please. May I ask how a seventh grader was able to purchase M rated games? It was his freaking parents. As far as I know all the major chains won't sell an M rated game to a minor even though (as far as I know) it's technically not a law. Hell, the independent game store where I live gets complaints from parents when they won't sell Johnny the latest FPS because of the rating. Yeah, cause getting out of the car and coming into the store is such a hassle....
Okay, yeah. I may have player Resident Evil 2 when I was 13 but that doesn't mean I went outside and started nibbling on my neighbors while high on bath salts.
However, I don't particularly like children, so go ahead and make that a law. Make it illegal to sell an M rated game to anyone under 18. Children are still going to get them because parents DON'T care. All most parents care about is making their damn kids shut up for a minute or two to get some piece and quiet.