I use Picasa Web Albums, mainly to exchange photos with my kids. Other than that, a number of other forums, mainly computer related, and a few Yahoo groups - GPS, hillwalking and BMW bikes.

I don't do anything that requires me to give more than a username for public consumption, a password for access and a contact email.

I look at YouTube, but no more, and I've never been tempted to look at any of the others you list.

Sad, aren't I?

Phil