Well I know that I play violent video games and I don't have behavioural problems.

I think that, if someone plays violent videogames it might affect them in a "videogame zone" mode sort of thing but I don't believe it would affect them very much...., but what do I know I don't play video games... :D

Violent video games have next to no influence on the players as long as they can handle the content. I've been playing mature games and excessively violent games since I was 11 and I'm perfectly humble and mature in real life. I feel that games with these mature contents should be restricted from very young minds, as even if they could handle it, it is still sending out some very destructive and powerful actions. (That is not to say that some of these games are not great in terms of morals, as they all are, it is just the method they portray to achieve those morals that are influential, but I digress.) It honestly varies from player to player, with each player's mentality and personality being a great factor in how much the game can influence them.

I think it's funny that modern parents are so concerned about a rise in violence and gore in video games, when their generation spent their youth watching loony toons shove dynamite down eachothers throats. At least our generation knows that results in a bloody, gory mess, not Coyote getting back up to do it all over again.

I think violence in video games, in the internet, and on tv will, over time, work to desensitize you to violence, but I'm not convinced that's a bad thing. In my profession it doesn't pay to be squeamish every time I see blood and guts, and gory video games and disturbing images on 4chan did their part to not make me want to puke every time I'm confronted with a laceration.

If you already have behavioral problems, I guess spending your youth virtually blowing peoples heads off might fuck you up further.

I'm an avid gamer, and I've seen plenty of blood and guts from games such as Prototype. I've never been in a real fist fight, I'm not even very assertive. I don't have violent dreams, and only violent thoughts when certain people REALLY provoke me. Considering how much virtual violence I've been exposed to, it won't make a noticeable difference regardless of how much time is spent exposed to it. What I will say could be a difference, however, is tolerance for formerly disgusting scenes. I have a feeling I have a much better chance of keeping myself composed from seeing someone get hit by a semi than a lot of people.

As long as the parents tell their kids that the violence is only fantasy and should never happen in real life.