Yes that is the motte to this bailey. Of course the actual consequences can range from being fired to being expelled to being publicly defamed as a racist. You still haven't given a way to decide what is or isn't a faux pas. I'll give the answer since you won't: it's whoever complains the loudest. In practice what is and isn't allowed is totally arbitrary. The only people who ever argue for that are power tripping moral crusaders.

As a reminder, all of this is about a pretend problem that produces no damage and has no victims.