@dredmorbius @stefanieschulte Sums it up.
The only fix I can come up with is to make bad interpersonal behaviour non-rewarding. (where the trick is to figure out what the "reward" here is. Attention, even negative, can be a reward. As can "getting away with it" be. So if you think that someone feels rewarded by column a, but it's actually column b, you're in deep trouble)