This is how I stay sane. Fighting someone's crazy doesn't work half the time. They bring you down to their level and beat you with experience. Sometimes you gotta just let someone get away with harmless crazy. But, if you're lucky, you can do more than that. You can join in. Lean in to their crazy, amplify it, back them into a crazy corner of their own creation. Best case scenario they actually have to feel the effects of their lunacy, and it causes them to reflect and repent. Worst case scenario you have a little fun.