don't be too damning
you sit two kids down in front of a computer, one kid plays tetris, the other plays killer ninja robots III the blood lust.  Obviously one kid is going to be more likely to display aggressive behavior.
just because the world in which the emotions of rage and violence are created are fantasy doesn't mean that the emotions are any less real. how is the brain suppose to differ between endorphines created by a tuffle with the school-ground bully, and the endorphines created when you get a killing spree in halo
i know what you're saying -- don't blame everything on TV, but i do want to make sure that you're not saying that the media has NO effect on violence