I've been gaming since I was a kid and watching Action movies since as long. Sure, playing Dizzy on the spectrum, while watching James bond films at Christmas, is hardly the pinnacle of bloody but the point is I escalated. From Dizzy to St Dragon, St Dragon to R-type, to Ninja Gaiden, to Streets of Rage, Two Crude Dudes, Aliens etc etc.
What the result? I dropped Aikido. I'm scared of actually hurting another person in practice and so can't train well.
Desensitisation to violence through gaming is horseshit. I totally agree with Jim's assertion that of the entertainment available, the news has a far worse impact on society.
Mean world syndrome, the mistaken idea that the world is far more dangerous than it actually is, is a direct result of the news industry, saturating peoples lives with images and ideas of danger at every turn. Despite the fact that crime has fallen dramatically over the last decade in the US (and UK, the last few years have seen massive profits for the American Gun Industry. For people like the NRA. Even though America is safer than it has been in years, Americans are buying guns by the truckload because they think that every other person is going to mug them, rape them, steal their shoes and what have you.
Of course the facking NRA, will lie about video games and of course the media will help them spread such lies. Each roup is run by the same people, the old boy network that profits from fear and intimidation and they have never been wealthier.