Like you said, most of those complaints about abuse of power come from people upset that they can't get away with some form of abuse... The bulk of the complaints about whales that I hear are that they vote on certain posts, while other worthy posts don't get anything. Hard to see an organized vote-cancelling-bloc forming based on that.

Handling a pretty typical user that goes on a rampage is an interesting use for a function like this... I hadn't considered that when you said "evil whales"