I think HN does it better than reddit, where the comments are hidden quickly once negative, but I've seen a lot of comments edited based on downvotes as people

I think HN does it better than reddit, where the comments are hidden quickly once negative, but I've seen a lot of comments edited based on downvotes as people wonder what, exactly, other users are disagreeing with. Doesn't exactly contribute other than to say 'your opinion is wrong.'