I received a permanent ban from r/AITAH but they gave me a clear explanation, explained the steps I needed to take to get unbanned, and when those steps were followed, they were friendly, quick, and respectful. Impressed. (All I had to do was delete my post in r/Achievements (a sub they view as a karma-farming sub). My post in r/Achievements was not intended as karma farming. I posted there to ask how to turn Achievements off.)