In a nutshell, the Rotterdam-based Suicide Machine helps users of Twitter, MySpace, LinkedIn -- and, once upon a time, Facebook -- sever ties quickly and painlessly with the real and faux friends they've accumulated in their social networking travels. (Introductory video here.) More than 58,000 friendships have been so severed since the site began gathering attention among news outlets and bloggers.
Social networking is just another fad, one that is waning as people go back to using the internet for finding out what the government is up to, rather than just chatting each other up.
The idea of personal space in real life is that you control where and when you get information. The problem with all social networking sites is that over time you become deluged with tr4i8vial junk (not unlike TV) and find yourself thrashing about in way too much data and unable to really evaluate it all (not unlike TSA).
The current trend is back towards a more selective allowing of intrusion.