Something big is happening, as Reddit seems to have purged literally every NSFW sub they know. Reason is always "unmoderated" despite some of the banned subreddits being fully moderated.
Edit: seems to have been a bug in automation (thanks @[email protected]):
https://old.reddit.com/r/ModSupport/comments/1ii67mt/_/mb3fewv
It's still a good reminder on how quickly a community (or communities) thousands of people enjoy and in some cases rely upon can disappear.
As far as I can tell, you can only block communities in sync which is why you're having to do it one by one. Jerboa you can just block the whole NSFW instance, one and done.
I can block instances. It's really not that big of a deal. Just pointing out that an influx like that, I'm sure would bring more instances, and more stuff I wouldn't want in my feed I'd have to block.