So here's a quick video games and violence anecdote for you. We recently got lego star wars for the Wii because it has hit the clearance bin and there is fuck-all to do when its really cold out. For the last couple of years, my daughter (who just turned 6) liked to just watch and give 'advice' for games, but now she is getting into actually playing, and has decided she likes playing this game with me. This mostly consisted of using her R2 to zap bad robots in the bar right up until I started the mother of all brawls out of boredom when she happened to have character with a shield and spear. I'm standing there parrying laser blasts with a light saber waiting for an opening when my girl exclaims 'don't shoot my dad!' runs up from behind and clubs the guy in the back of the head.
To my everlasting pride she told her grandmother about it a couple of days later (after
many more bludgeonings/shootings on her part -- odd how I seemed to be stuck in a defensive position and needing help so much
) to which my mom replied "good, you're supposed to protect your family."
The downside is the now she'll charge head first into a group of storm troopers guns blazing expecting me to be able to cover her from the rear with a light saber.