It seems to be unrelated or not entirely related to tagging. I’m getting unblurred posts in new that are flagged nsfw when viewed at the same on a web browser.

OP, MUDs are a real treat if you’ve never experienced them, but you want to find a good, active, sane one. I highly recommend Discworld MUD, even if you’re not familiar with the Discworld book series. I’ve been there on and off since the late 90s. It’s amazing how much love this game still gets from admins and creators, and it’s 100% free to play.

Just keep in mind they’re no less addictive than their modern equivalent, MMOs.