I haven't dug through all of the old posts on this, but it might be nice to know when we get new karma points, much like occasionally I see popups for replies in threads I've posted to (but not always). Even nicer to know what thread people were reading when they decided to give me karma points. I don't care who gave me the points, but it would be nice to know which of the current threads people feel I'm being helpful. But I can see how no matter what you do, it is open to people trying to game the system.