Figured worth making my recent-ish policy explicit: if you're unnecessarily negative, I'm just going to unfollow you. I don't have time to spend fighting.

Criticism and feedback are welcome; but it's possible to provide both without unnecessary amounts of negativity.

"If I question something that you're doing or criticize, how do I know if you're going to unfollow me?"

FAFO. :)

But in all seriousness, this is not hard for most people. Be civil! Avoid personal attacks! Take a deep breath before firing off a reactionary cast. 

This is all advice I have to give myself, too. And totally reasonable for people to unfollow me for this (or any reason, really).