Games - The Jury Is Out And Confused

Thanks to Blue's News for pointing to a New York Times article entitled 'On Video Games, the Jury Is Out and Confused' (registration required). It talks about the mixed messages being given to parents about video gaming, especially with regard to violent content, and its effect on their children: "In the face of contradictory, inconclusive or just plain confusing evidence, some parents... agonize over what limits to set." One concerned mother even has to keep her spouse in check as well: "My husband is a little hard to control. Sometimes he lets them rent games with little figures on top of buildings trying to shoot each other off." What limits do you or your relatives put on their children's gaming, and why?