It's quite likely that the content itself may well be mirrored to an archive as has happened with geocities. It's likely that any truly embarrassing or interesting picture will be pretty much immortal online.

Seriously. I have a two-year-old; I found myself wondering about how he would deal with Facebook, etc., until I realized that if he had been born in 1991 instead of 2011 I'd have been wondering how he'd deal with dial-up BBSs.