The top two mistakes I ever made on the Fediverse were unknowingly posting in Chapotraphouse in hexbear.net, and similarly in Lemmygrad.ml. Lemmy was practically unusable for me until I realized I could block those instances (and later lemmy.ml), which improved my happiness here by >99%, no joke.
Definitely it's worth paying attention to how instances work.
Of course it's a joke, but also...
Whether intentional or not, it does kinda reflect the spirit of toxic insensitivity. Also, however it started, they left it that way even after this fact was pointed out to them.