Think very hard about what you say on FB! I (try to) restrict my contributions to 'liking' friends' photos of gardens/pets/babies/pretty landscapes, and my posts are on similar topics. It's lovely to see photos of friends and family, and I'm happy to keep in touch that way, but it's no medium for debate! In future, Alexa, if you have an interesting point to make about a post, it might be better to send a private message. There is always the suspicion that the third party (your son) is fighting another battle with you under this guise. I wouldn't pursue it if I were you. See if he says anything else, but for goodness sake, don't carry on family business in public.
I feel I'm failing them - feeling lost
Is this a normal thing? - neighbour using wifi
Only telling GN pals - secret talent