How is this allowed?

[Merrigan]

I'm just gunna say, if any 12yo are playing games like GTA or playing any MMO without supervision, the parents aren't parenting. Don't blame the game for not being an appropriate babysitter.

I have flashbacks of those parents who ask you to educate their children for them, happily forgetting that your role as a teacher is not to do everything but to help them progress in a given subject.
Same thing here, as you say: games can't replace parental control either.