> Racial slurs aren't acceptable anymore. That isn't what brought about the civil rights movement, but it's an important consequence of it.

I don't really want to pick sides on 'ban bossy', but I do think this particular analogy is flawed. Unlike a racial slur (or any other identity-based slur), 'bossy' describes intrinsically negative behavior. People who are 'overly authoritative' or 'domineering' will always be looked down on in society whether or not this word is 'banned' or not.