This question already has an answer here:
I thought suspicious voting patterns were just noted in the mod's "Suspicious voting patterns" list and it was up to them to determine if the votes should be undone. Is there more to it than this? If the voting pattern reaches a certain threshold, will the votes be undone automatically?
The reason I ask is because Fog Creek has created a FogBugz FAQ user on http://fogbugz.stackexchange.com to post documentation. I have recently voted on many of this user's posts only to see all those votes disappear.