okay... serious post... from what i can figure out, you click the bottom right yingyang symbol to provide feedback on someone's post... that feedback can be viewed by that person only, under their profile...
now, if the feed back is positve, that person is given "positive karma points" if it is negative, that person is given "negative karma points" ... green rectangle = positive, yellow/red(?) = negative (not sure if there are other colours)...
now i'm not sure of the purpose of the points or the purpose of the karma of the overall thread... not sure how they come into play..