Hmmm... I don't see what's wrong with just putting a classification on these games - just like videos / DVDs. GTA's various versions had them, and so did Perfect Dark. In Ireland it's a serious offence to sell a video/DVD or cinema ticket to someone under the age classification for that film, but it's not enforced for buying games. Part of the responsibility would have to be with the parents though as they'll buy a lot of the games without ever having read about it or seen it or looking at the age rating on the box...
