If I want to block all hentai communities, I should be able to add *hentai* to the block rules, so that it blocks all hentai communities across all instances now and in future.
We can still use individual blocking to block a specific community from a specific instance, but a wildcard match would be the perfect solution for the federated nature of lemmy.
That would likely cause issues with over censorship if there’s communities like Reddit’s /r/EarthPorn for example. Might work with hentai though.
eh. I don’t even remember an actual porn subreddit with the word porn in it.