Tolore you can throw all the anecdotal evidence you want at a problem and it wont be any closer to solved when you get finished. Substituting one argument, that observing the demonstration of violence desensitizes and in some instances increases aggression in youth, for the one-sided argument that "games make people violent" is participating in the wrong discussion. You're arguing that games don't make people violent, and I'm arguing that games have been shown to increase aggression. There are more effects on kids from virtually simulating violence than reaching out and attacking neighbors... they're different arguments.
The study actually says your aggression levels increase
while playing video games and for a short time afterward. They go down after you've stopped playing. Not immediately, obviously, but after a short time has passed. It's no different than me watching and being very into a violent movie. You're experiencing that violence vicariously. Once that stimulus is gone, so goes the increased aggression and adrenaline. It's like how someone see's a martial arts movie and right after they walk out, they feel like they can kick everyone's ass. After awhile, that feeling goes away and they're back to being rational.
But the study was done on very young children, so you have to question just how dependable it. It states children, boys particularly, "act out" what they did in the game. Is this limited to video games? Absolutely not. When Power Rangers first came out, every guy I knew was suddenly a martial arts expert and all we did was fight each other. That's how children learn. We imitate what we see. It also stated children who played violent games were prone to argue with "authority figures" and get into "physical altercations" with other boys. First, what's wrong with arguing with authority figures? Oh no, he's questioning my authority! Please o.0. Secondly, what constitutes a physical altercation? Play fighting? Hitting someone's arm? What? It didn't say.
Experiencing violence vicariously may actually explain why violent crimes have gone down since the onset of video games. Because we get our dose of violence through interactive media, we don't feel the need to act out in the real world. We can do whatever as we please in our little virtual worlds, releasing our aggression and anger.
http://www.tudy.ro/images/blog/violentgames.jpg
So what do we do? Ban what lets me get rid of my aggression without anyone getting hurt, or flip out on the old lady who kept looking at me?
Final note, if you're going to argue that exposure to violence in videogames desensitizes us and may make us want to act out, then it isn't hard to say pornography will do the same, and people will most definitely make that argument should sex in games ever become a huge issue. What would they argue? Porn makes people think it's alright to bang whoever you want, whenever you want. Think that nurse is pretty? Bang her right there and then. You know she wants it. And that brings up something else: the objectification of women. Pornography makes men forget that women are people, too, and you need to communicate with them. They have feelings, Boyster. They aren't just sexual objects. Female pornstars have been brainwashed into believing this is what they actually want, but it isn't. They all have one thing in common: they were all victims of sexual abuse as children. Because no one was there to help them through that, they believed they're worthless trash and sold their bodies for money.
Obviously, all of that is bull****, but until we test it on 8 and 9 year olds and find out the complete opposite is true, it'll be the logic employed by the same outraged parents that let their children do as they please.
I'll throw this in because it's hilarious:
http://www.penny-arcade.com/comic/2006/4/12/