I think it's one of those "worst system except for all the other systems" situations. You can't really have any kind of discussion forum with highly polarized

I think it's one of those "worst system except for all the other systems" situations. You can't really have any kind of discussion forum with highly polarized groups. For a roughly aligned group, it lets good comments rise to the surface, though doesn't guarantee all will rise. I think more important is keeping a relatively aligned group, smaller number of people, and some benevolent dictatorship to keep out the riff raff. It's a lot like democracy, it only really works when people mostly agree anyway.