good idea but it would never work, well I think it can't because for it to work it has to be a complex equation/ function and nothing complex works for most people, you could aggregate responces, rep of voters and general activity then do some magic(math) and get some wonder looking result, I remember a while back there was a person who was rating posts in the # based on the rep of the voters, that was a great way to show quality and engagement rather than just who's trendy andd who's whale riding ...