I do not think that violent movies, games, etc. somehow influence this... There should be something wrong with the person, not with the movies he is seeing... Psychologists also think that horror movies just help some people to escape from the reality, if a person likes violent movies, it means he has some problems that bother him (it maybe loneliness, grief...whatever), only this kind of movies can help in overcoming it and finding a solution. I agree with that, I always see deep meanings in horror movies and games.
Well, there are always movies that has no sense at all, they are just violent... That is a bit different issue for me, I do not think anyone should watch such movies, not only children... There is just no use in watching them.
So, I am also mixed up... trying to think it all over is hard. But I am sure in this, it is not only violent movies and games that are the reason for murders and other crimes.
Cain killed Abel with no presedence for such a thing.
You may not believe in this bible story, but it is an allegory at least for man's innate sense of violence. I believe it is within all of us as human beings.
I think it's safe to assume that the first act of violence happened prior to the advent of art, such as literature and videos, meaning such things do not create violence in an individual. Additionally violence depicted in art apparently does not cause or encourage violence in most people. However, the reality that people who commit violent crimes have afterward sometimes been found in the possession of certain works of literature or other forms of art is documented fact. So, observation yields the deduction that certain individuals must be subject to extreme violence, and that certain materials sometimes encourage violent behavior in those individuals.
Kaincidentally, Uncle Steve spoke to this concern in this past Sunday's CBS interview...