So any instance that allows NSFW content in even some of their communities is to be automatically defederated from Sopuli? Is that really the only tool available in Lemmy, complete separation or nothing?
I think if we could "silence" NSFW communities so you wouldn't see their posts until you've followed them then it should work. Right now, as far as I know, our tools aren't very fine grained. This should be a temporary block until we can sort out how we can get more control over what shows up where.
I don't have an informed answer for you, but a quick browse of their website leads me to speculate they are bordering on pornography with some of the images I've seen pop up on what appear to be anime posts.