[jiggy2011]

That might have worked when most households had 1 or 2 desktop PCs and a 56k modem between them.

Now, everything is starting to have internet access in one way or another including games consoles. Whilst very young children might need a lot of supervision regardless, I don't think 12 years olds are going to be too happy with their parents sitting in their bedrooms with them all evening while they play xbox.