RMS, a disgusting person who is often right about software, and built some good stuff.
(Back then someone suggested adding a "we-don't-like-them" clause to Free licenses which prohibits the use of Free software by "bad people or bad companies" (e.g. the US Migration Service for its policy towards migrants). ESR pointed out a violation of paragraphs 5 and 6 of the Open Source Definition: "No Discrimination Against Persons or Groups", "No Discrimination Against Fields of Endeavor" in his usual way of communicating and... Well, you know how it's ended up)