As we approach social networks

Hi all,
as we approach the week on social network sites - I found the post from Fiona Bradley on Libraries.interact.info interesting - How to manage your online identity
She talks about not leaving your online identities behind as you decide to no longer use these tools - how many times in all this have we joined up to things and then promptly left it there in Cyberspace to be used never again.
Particularly with social networking sites she also talks about not leaving stale information behind if you decide to stop using that site or if you no longer want to have your details available for people.
Some sites are easier to disconnect from than others. And that old thing that keeps bugging me - privacy and how people new to these tools manages their online identity is also discussed,
Scritty