This is why we need to go back to the 1e days of Gygaxian Alignmnent Policing & Consequences.
Law & Order: Alignment Shifting Unit
Sgt. Gygax: It is of utmost importance to keep rigid control of alignment behavior with respect to such characters as serve deities who will accept only certain alignments, those who are paladins, those with evil familiars, and so on. Part of the role they have accepted requires a set behavior mode, and its benefits are balanced by this. Therefore, failure to demand strict adherence to alignment behavior is to allow a game abuse.
Det. McNulty: Got it Sarge. So what do I do when I catch one of them miscreants doin' that game abuse? Throw 'em in the pokey?
Sgt. Gygax: No. Drain a level. If they are a cleric, punish them severely. If they move out of the required alignment for their class, take their class. Suck it, druid. But that's not why we're here. Internal Affairs just gave me the graph of your alignment, McNulty. And you've ... drifted. Time to pay up!
Det. McNulty: What the eff did I do? Also, I want my union rep.