On the user side, there are options that allow them to be warned that a post is NSFW or hide it entirely. If a post has tags, they can hide those tags too. There are also custom feeds users have that only show them posts with specific content and they don't have to be following you. An example is a bunch of feeds from furryli.st
On the poster side, I know you can mark a post as NSFW.
On the poster side, I know you can mark a post as NSFW.