Excellent - and funny - piece by Boing Boing's Cory Doctorow on the real problem with Social Networks: You pretty much have to talk to everyone who asks you.

Quote:

It's socially awkward to refuse to add someone to your friends list -- but removing someone from your friend-list is practically a declaration of war. The least-awkward way to get back to a friends list with nothing but friends on it is to reboot: create a new identity on a new system and send out some invites (of course, chances are at least one of those invites will go to someone who'll groan and wonder why we're dumb enough to think that we're pals).

Infoweek piece