From time to time, I look at the profile of a user who's posted something crap, done something I think is inappropriate, or otherwise annoyed me. If I see that they have a history of posting rubbish, I'll tend to click through and downvote much of it. (Of course, I don't downvote decent contributions out of spite - even if I don't like the authors.)
As far as I know, what I do is allowed, but I worry that one day the serial downvoting script is going to consider me evil and reverse my downvotes.
If this happens (assuming it hasn't already), will I be notified, or do serial downvote reversals happen without informing the downvoter?