Even then we could always get a different filter system that detects what's bypassing on purpose and what's just a harmless word Support.
Kiss your sister No support, it's like doing it to "WTF" because of it meaning "what the ___" when it can mean lots of things.
100% support I don't see why people complain about it being worth a ban or not. If it's filtered they won't get to tell people to kys. The harm won't be done. Why not prevent the rules being broken before they're broken, in stead of punishing people to understand that what they did was wrong?