Why downvote? I honestly do not get it. 
anigbrowl: I don't think that most people downmod for just disagreement, but rather for stupidity, noise, trolling. Sure, some people vote a comment down to express disagreement, but their votes are often cancelled out. And it's not so unusual to see two HN'ers having an argument and both gaining karma from it if their arguments are well-formed, respectful, and informative.On the other hand, comments such as 'more like CLOWNvote, amirite???' don't really improve the quality of the discussion, do they?