I think many people are too competitive. As well, it may discourage real debate for fear of getting "neg-repped". But there should be some way to "high-five" someone without breaking down the thread. And if rep is going to continue, I think getting more rep if you get high-fived by the "right people" makes boot-licking more of a reality. Some people just crave attention and they are people pleasers, so they will please those from whom they can get the most "rep". Rep needs to just be even. Five points from anybody who reps you, whether they are new, old, left, right, whatever.