Thanks for taking the time for your long message. I tried searching for this topic on my lemmy alt. This topic did not show up on either my fedia account, nor the kbin magazine at first, but does now. One more oddity I noticed is that the mbin UI did not hotlink your mentions, but the lemmy UI did so correctly.
I absolutely support this. Idealy, we'd have 3 NSFW tags: One for porn, one for gore and one for everything else.
Side note: I'd also very much welcome regular tags for posts. Have you tried to search for a specific meme you saw a week or so ago? It is impossible. I'd love to have tags for different meme formats and templates, so you can more specifically search for an image post with an generic title.