Show HN: An anti-social graph Facebook App for declaring enemies.
So this is something I've been working on for roughly 1.5 months. It's got it's flaws but maybe someone will find it interesting.
I'll save you from having to install the app to learn more about it. You can read about it here: http://www.deanterry.com/post/18034665418/enemygraph or visit the app here: http://apps.facebook.com/enemygraph