Do video games promote violence? I've never played a video game that told me to go beat someone up, outside the context of the game. Besides, advertisement is an industry of failure. Do you really think that people buy whatever products they are told to get whenever they see an advertisement? We're dealing with communication, not coercion.
Anyway, I'd argue that the answer - of whether video games can cause violence or not - is irrelevant. My freedom to experience, or express myself by creating, a video game is more important than removing one possible source of violence and aggression (of many). The same logic that would ban or restrict violent video games should apply to any medium, and that is not acceptable. I want to be clear: I am not making a "slippery slope" argument. I am saying that if violent video games are to be restricted for our safety, then all other media, which would have similar effects, should be effected by the same legislation.
Needless to say, I'm strongly opposed to this.