I also keep mum on Facebook when I’m writing about living people. My ex-roommate seems to have stopped speaking to me when I made the mistake of sharing the links of a couple of humorous pieces I wrote that featured her. I did not fully identify her and only those who were present would have recognized her. I’m quite sure none of them would ever have found the articles.
I think it was my perspective that offended her because I saw more humor in it than she did. Those incidents happened over 50 years ago. I wish I’d never shared the links. We had just made contact on social media in a private message after 45 years, and she hasn’t written back. I never expected this would affect her so negatively.