I've been unfriended by a person or two, I think, and perhaps their reason is your reason. One former colleague actually made a post to say that he didn't appreciate politics showing up in his feed because he uses FB as you do. I felt a little badly, as I thought I was one of the people, if not the person, he was talking about, but of late I've noticed him liking some of my posts (which are probably 90% political, the remainder being nature and farm life, with non-political humor bringing up the rear; I too am in nonpolitical interest-based groups, though) and even commenting on some. I use my feed as my little C&C-like warning to others who may not read and hear the sources I do, or have the same fund of knowledge for analysis or comparison. I've had people I know in real life tell me in person how much they appreciate my feed, which they use as a sort of news source, but the vast majority, including those who tell me that, neither like nor comment. I'm an introvert with no desire to share details of my life online with anyone, but the conclusion I finally came to, when I started maing political posts, was, "if not now, when; if not me, who?"