Psychological studies purporting to show a connection between exposure to violent video games and harmful effects on children do not prove that such exposure causes minors to act aggressively. Any demonstrated effects are both small and indistinguishable from effects produced by other media. Since California has declined to restrict those other media, e.g., Saturday morning cartoons, its video-game regulation is wildly underinclusive, raising serious doubts about whether the State is pursuing the interest it invokes or is instead disfavoring a particular speaker or viewpoint.[q
That's the majority opinion in the case decided today striking down California's law.

For the record, I don't think playboys should have paper bags over them for minor's sake.