Universities are not here to be mediums for the coercion of other people, they're here to be mediums for the free exchange of ideas.
I'm a mirror. If you're cool with me, I'm cool with you, and the exchange starts. What you see is what you reflect. If you don't like what you see, then you've done something. If I'm standoffish, that's because you are.
I don't get what my signature is supposed to mean if we haven't had some kind of exchange.