If I recall right, there might have also been a rule about not talking about that you got a warning; I hope I am wrong.
It is funny from a certain perspective, M rated game, censored forums, censored in-game chat. And people ask me why I dislike living in this reality.
As for your word; an in-game emote, right? Alright, if it's a banable offence, why is it in the game? I am certain that the dance emotes which came out with Octavia were even mo-capped, so it's not like some animator just snuck 'em in and nobody noticed for months.
In my opinion, this case sounds like an ''accidental''