> I know my goal: shift the default in open source from “it’s free for anyone to use” to “please don’t use this if you’re evil”. I don’t just want to do this for my little project; I want to slowly change the discourse.

Good luck. Defining evil objectively is, of course, a challenge. But even with an unambiguous definition in hand, enforcing or detecting it is nigh impossible. Especially since the truly evil will simply lie, ignore the terms of your license, and use it anyway.