I have had a problem on my board where a poster (I think - Agoracom administration would know better) has used multiple aliases to try to attack my credibility with innuendo and unsupported attacks (supposedly polite disagreement, but relentless an unsupported).

The poster (and all his aliases) give me a poor rating.  When the alias "steps over the line" often enough I ban the user.  However, the poor rating stays.

I know this does not affect my ability to maintain control of the Hub, but it does reflect poorly when newcomers look at my rating, still see a large number of "voters" and a very poor combined rating.