Many NSFW have nothing to do with porn. Sometimes are horror contents, some times are crude images, some times are just lazy people who don’t know of the Spoiler tag. Can we have a quick and easy way to filter off all the (very funny but not alway wanted) Porn posts without locking out those other contents???
I think copying Mastodon would be the best for this. You can mark the post as sensitive (nsfw), which blurs the images. You can also add a content warning that can be used for anything (nsfw, nsfl, spoilers, etc).
And then use tags separately for categorizing posts.