Banned before they started is hyperbole.
I mean they should have been shut down at the first report of the illegal/pedo activity on the sub, they should have lasted weeks to months at the longest.
They should have never been around long enough for someone like, me, a vanilla layperson who does not go to reddit for porn, to hear about - which is they were around for years before I heard of them and for more years after.
On Fedi I also think communities like this should be banned, and typically they are, the admins of the largest instances are very protective of what they are hosting and linking to and I appreciate that. NSFW is also much more compartmentalized on Lemmy, so I very rarely if at all run in to anything more than people being politically questionable but not physically.