Finally, social networking I can get behind

BuzzMachine's Jeff Jarvis has a good idea for a new kind of Friendster ripoff.
I've had it with friend networks. I want an enemies network. Six degrees of enmity. You are whom you hate. I want to send email to people: I hate you, do you hate me? I want to see reverse-friend networks: Any enemy of yours is a friend of mine. I want an automated social system that tells my friends whom not to invite to the same party with me (henceforth known as the Gawker index). I want to make it a life's ambition to build a longer enemies list than Richard Nixon. I want to be mean again. Enough of this friend crap.
Right on.

Right now, social networks lump people into two categories: I know him, or I don't know him. Let's have a third category: I know him, and he's a jerk.

I suppose that's what's missing from social networks: a real image of how people categorize their relationships. Right now, they're Barney networks ("I love you, you love me").