I’ve seen similar things.
If you disagree with this concept, go to a west coast US metropolis and and try to have an open private discussion about something taboo (e.g. abortion) where you’re openly against the status quo. Odds are good you’ll hear about it.
For example, I used the term “wife beater” to refer to a tank top, in a private conversation, at a Berkeley bar. Within seconds I had a total stranger come up to me and tell me I shouldn’t use that term.
Even having a political conversation with a friend in a place you can be overheard carries a certain amount of risk.