This is standard. Reddit's started doing it too recently. Totally random stuff, instabanned. Reddit threatened me with a suspension for threatening violence over a polite and entirely non-violent post. Meanwhile, I report actual revenge porn, and they reply that it doesn't violate their content guidelines. (and I mean completely unambiguous with a posters gloating about how it shows up when googling the victims name…
I remember in a subreddit, there was a discussion about Facebook "top posters". I replied it wasn't exactly news, and wrote about the "top posters" to the letters to the editor of a local newspaper in my childhood. One was a famous TV meteorologist who would always write rebuttals to young earth creationists, from a Christian perspective. One guy was leader of a tiny racist party who would write about how Yugoslav refugees would take over our country. Others still were just old cranks who had an opinion on everything.
The guy who owned that subreddit banned me over "doxing". I tried arguing, hey, they were public figures in their day, writing under full names (and location!), and they're long dead now anyway, but he either didn't want to admit he was wrong or was just terrified of losing the subreddit to the admins.