I’m not a prude by any means…
… but they’re currently allowing communities dedicated to loli content. I just had to block a community that had titles like “after the rape” and containing animated material depicting minors.
I don’t know about others, but I don’t want that shit in any way coming across my feed when I try to look at All.
And clearly anyone who does want to browse other NSFW communities is free to make an account on those instances.
I do not like defederating instances for moral/ethical reasons. If that is the mission of the instance you join, so be it. I would only defederate as a last ditch effort to stave off technical or legal problems. Burggit plays in a grey area with the legal side, but I still wouldn’t defederate until it’s demonstrably causing a problem. I would also support defederating from instances where they are abusing federation to inflict harm on other instances/users.