[otterley]

Of course not.

First, none of the situations discussed involve the N-word, so what you're describing is a hypothetical example, and a very special one at that. I think it's expected that a professor or staff member would be fired for hurling racial epithets.

Students, on the other hand, are a different case. For them, it's the institution's duty to intervene and help resolve the conflict, educate the speaker about the historical background, help instill empathy, and counsel the victim. Academic probation is often a tool that can be used if the problem cannot be resolved, but expulsion is typically the second or third step, not the first.