if a comment on a forum thread/staff produced article produces more than 10 down votes, I believe that that comment should be pulled/blacked out from the thread/article. Each commenter with voting ability only gets one up vote or down vote per comment, and if a comment is judged down votable by 10 users, then it's pretty obvious that it is a non-productive/argumentative comment. There is really no need for certain comments to be left displayed that rack up 45 down votes. At some point, beating a dead horse is happening to posters that may have had a lapse in posting judgment.
If a poster feels that his comment is really important, even after it gets down vote removed, they can always re-post their opinion and give it a rip, or think about possibly rewording their opinion, so their point is better communicated/less argumentative.