The absolute worst are when some mod shadow bans you (all posts / comments are silently removed), and refuses to tell you why. I had that happen on my city subreddit, I guess because I said we needed a larger police presence to get property crime under control. That was the only remotely controversial thing I've ever said there.
The joke goes that BPT is all white people, and TwoXChromosomes isn’t actually moderated by anyone XX
black people in the US have some kind of shared experience they want to discuss, conservatives maybe don't want to fight with everyone all the time. its not my place to invade then. if there are people who to engage online with multiple viewpoints there are plenty of places to do that.
i wish the city subreddits enforced residency requirement or something similar to post
What I really disagree with is having a public sub that's basically 'read only' except for your chosen group. I will straight up filter your sub from r/all if you do that.