While it's generally a bitch, karma is used to give points to good forum members and subtract from bad forum members. You can give or subtract 24 karma per day to someone else (1 per hour).
It's currently a test, so if I see this is being abused, we'll just remove the system and ban the abusers. Simple as that.
Enjoy!
Karma has been disabled. I unfortunately didn't see the positive effect and the abuse was too big.