ABW,
When you look at my Karma section below it says Applaud and smite. So if I said something you like, agreed with or what ever that you found possitive you would press the applaud button and my + Karma would go up 1. If I pissed you off you could press the smite button and my - Karma would go up one.
They are all anonymous so you never know who to thank or who to smite.
LT