If someone is logged in with moderator status, or they are surfing as A.C.'s, then don't display numeric ratings on the posts. This way moderators can assigned ratings based purely on a post's merits (or lack thereof) and not based on what another moderator has to say.
I suspect that hiding the scores would actually increase what you want to prevent. As it is, a moderator can see whether a post has been moderated appropriately. But if you hide the scores, every moderator might increase the score on a post that is slightly above average. You would see a post that might deserve a +2 turn into a +5 because every moderator decided that it was worthy of a little extra attention, and they were unaware that the post had already been given that attention. Leaving it the way it is allows moderators to move the score towards what they think is ultimately appropriate.
