Not sure how to say this, but an idea of Abba's was to add an option similar to the Thanks! counter where if the last poster said a funny joke, then someone could "laugh" that post instead of adding another post afterwards saying how funny the joke was.

Then, we could find who is the funniest poster at Chessforums.org!

Too much potential for abuse...most of the stuff some people post would rate a "laugh."