I think the things that most game critics overlook is the fact that kids who play violent games are usually breaking the law just as much as the ones who sneak in to see adult rated films.
When a 13 year-old is playing something like FEAR 2, then you know something is wrong. Either it's the fault of the retailer, or it's the fault of the parent. It's usually the fault of the parent, who doesn't want to take the blame for a mistake that they should have prevented in the first place, so they tend to blame the game for being 'too violent' for their little, spoiled brat.
Honestly, I think the nice thing about violent video games is the fact it gives me a way to release some tension, let off some stress, and kill some people without ending up in jail with a life-sentence. Reading a book or watching a movie doesn't let me do that, which is why I play violent games like L4D2 and so-on. If it was 'Scientifically Proven' that these children were more violent after playing violent video games, then let there be a test that's actually run by a game/console company, and not an anti-videogame violence group, hm?
I just wonder how people can even be quite that self-righteous to defend the movie industry, with things like Saw, and Saw 2, Jurassic Park, and so-on, so-forth, and then bash down on video games. Yes, there's the difference of interactivity, but all they're going on about is the problem with violence. x.x;