Don't forget the kids who have parents who believe they'll always be able to tell the difference between fantasy and reality, and when they go off and do anything against the laws of society, it can't be their fault.
Seriously, we've heard this all a million times. Yes, some video games can damage a child's psyche, but what is a child doing playing said games in the first place? It's a parent's responsibility to know what games their kids are playing, but it also is never going to stop. How many people on this forum who are over 30 have kept 'magazines' under your mattress back when you were a kid? I believe Adam Sessler said it best after his debate with Jack Thompson: "Adult things get into the hands of children. Children like to fancy themselves as adults, and so they do adult things. Sometimes its good, sometimes its not good, like smack. This isn't something new that came about on the era of video games."
And to all the parents out there, he then followed it up with something beautiful: "Oh, I don't understand these ESRB ratings, they're far too difficult. *Picks up GTA4* M, Mature 17+, hang on, let's look at the back. Blood, Intense Violence, Partial Nudity, Strong Language, Strong Sexual Content, Use of Drugs and Alcohol. Where's the f*ck*ng mystery? My god, the game is called Grand Theft Auto."
Although children will always find a way to get a hold of these things, parents need to step up and admit that they need to watch their children in even the slightest bit. And to you people who are dealing with parents saying that all video games are bad, sit them down, try to explain your point of view, or even try to get them to play a game with you (not Gears of War or Halo, that would destroy the point). Not all video games are bad, and there are some people who need to accept that while some video games are higher up on the violence scale, they're labeled M for a reason.
And as a side note, companies like Bungie really need to stop adding fuel to the fire. Making Halo 3 soda is perfectly fine, but backpacks and lunchboxes? I hardly think that they're targeting adults with that stuff.