So porn involves copyright, a legally distinct category of activity.

Which i did in fact already know, i didn't realise you were referencing something that you hadn't mentioned in your reply.

I'll assume you don't actually have a basis for claiming that prostitution involves copyright then.

I get that it sounds like splitting hairs, but we are commenting on something with a legal context, the legal distinctions are relevant.

Taking a step back: this is c/declineintocensorship not c/piracy. The fact that these are copyrighted means these pictures had even more protections than if not, legally speaking. Even ignoring the sensitive nature of these pictures, it is reasonable for the owner of content (the actresses and or producers) to enforce their copyright protections on these.

Indeed, as seems to be the case here.