The old Slashdot comment system before the original creator left worked very well. It was proud to say that the only comment they were forced to delete was one

The old Slashdot comment system before the original creator left worked very well. It was proud to say that the only comment they were forced to delete was one that criticised Scientology. That was because they took Slashdot to court. Users moderated comments with a set amount of mod points, usually only having 5 points to moderate up or down at a time (every few days I think for people with excellent score), there was metamoderation there as well, user metamoderation mind you. Not sure if metamoderation was there at the start, but the comments I generally saw were generally quite good. It was great to get various viewpoints without all these people trying to stop people saying their piece like we find all the time today. Not that no comments were removed, comments were hidden if they were below a specific score that you set. You could set the score to -1 if you wanted and see all the comments, and it was nice to do so sometimes. Note that it really did work like a democracy to show what comments people really thought were worth upvoting. It worked. Now with the new owners there is a link to flag a comment on the bottom right of each comment. Sad.