Consider making a global "no porn subs" rule.
Not some kind of puritanical general ban on even occasional tits and/or ass (to make a point or something). Just subs dedicated to porn / focused on porn posting. They're out of place here.
But that''s censorship!
The internet is full of porn. Porn is not in need of political asylum. You can find and post it all over the place. Even the scummy and illegal varieties (sadly) have plenty of dedicated websites.
So why post it here? What is even the motivation? Why make the effort, given the minimal audience for it here? This is not a matter of censorship. But of staying on point, and getting rid of junk and spam that just doesn't belong. Not to mention some of it could be legally compromising... and for what?
Awkward edge case: /v/DeepFake. Lots of porn, obviously, but technically more than that. Certainly has the potential to be used for much more. A bit sad that most people threw a fit over the porn instead of seeing the potential. Also arguably a political issue.
Alternatively: Differentiate between NSFW and PORN