Not sure about that one. I understand removing all the votes on a post, or removing the ability for a post to be marked as a best answer (if it's complete trash), but listing votes and letting you delete some may become a bit of a performance problem if there are a lot of best answer votes. That said, I can probably add a moderator feature to remove a certain amount of bestanswer points, but that would take quite a bit of database layout changes, since the database layout right now wouldn't support that.