In a Realm owned by a friend the profanity filter cannot be turned off. This despite everyone in the realm having adult MSA's (and everyone being adults), having their profanity filters turned off, and the realm itself having the profanity filter turned off.

I checked my account's filter just to make sure and it is indeed off. After turning it on and then off again it works, but only for that session. When I log back on it starts censoring us again and it's really annoying.