Don't MS, Sony and Nintendo all have policies about what types of games can be on their consoles? Has a game actually been released with a AO rating on any of the consoles? I was under the impression that all "official" games that get rated and carry the console manufacturer's logo on the box have to be authorized by the respective manufacturer, and they would not authorize distribution of games with that rating.
Not that it should
matter anyway. It takes all of 5 minutes to set the family/parental controls on any of the consoles. If parent's would actually take responsibility for their kids' entertainment, we wouldn't be having these conversations every couple months.