I've been following them on Mastodon for a while. Lots of quality posts there.
The phenomenon is real though. On reddit, everyone HAD to mention their bona fides before launching into a criticism on r/exmormon, and on r/latterdaysaints, you had to mention your bona fides before asking a "risky" question. It seems completely normal when inside that world, but as soon as you step out, and disconnect a bit, it becomes very apparent.