To deny media has an impact on your life, is to be ignorant in my opinion. I mean no offense at all by saying this.
One example. I've watched a few horror movies recently, and they are far more gory then i ever saw in my life.
The next horror movie i watched after that had ther same type of gore. I was not grossed out as much as i was the first time. The first time desensitized me, so that after the first time my mind was able to except it and look at it more then the first.
Fact is, the more you see something the more you beleive it isnt affecting you. Another fact is you dont usually realize it until someone points it out. You have changed due to the games you played and movies you watched, think of how you would be without those games and movies. You would be different and im sure you can appreciate that fact, which would prove my point.
I mean why do you think people want more violent, more realistic and more freedom in games? Because they dont get to do it in real life, and somehow its almost become a sort of addiction.
The mind is a very sensitive thing, until you start abusing it then over time it becomes desensitized. This is not a good thing IMO. It means we are more tolerable of these things in the future, and it doesnt sit well with me.