We used to have ratings here, where you could assign a number of stars to someone's post- But I remember it turning into a free-for-all with some guy named Mike0017, or something like that- He made some comments about a certain hockey player, and all of a sudden, everyone was voting down all of his posts so he had a negative score. It can be misused.
Besides that, there's a lot of info regarding this sport that isn't so black and white- Just because someone who may have a low "score" disagrees with someone with a higher one- Doesn't always mean they're wrong. Anyone who's really interested in whether or not they should listen to any member can always check out their post history through their profile to find out what sort of stuff they've been writing, up to their last 100 posts or so- Sure, it can take some time, and most people might not want to bother, but I think it means more than some sort of arbitrary voting system.
Someone please explain to me how Karma works?