In the Fallout meme's case, it was the "excuse me what the f***" tag. (No, the comment censorship wasn't the algorithm. That was me, to avoid triggering it.)
MODS; I GOT A QUESTION; I POSTED AN IMAGE WITH ONE SWEAR WORD
ONE F WORD IS NOT EXCESSIVE SWEARING SO WHY'D IT GET MARKED AS NSFW (WHEN I DIDN'T TICK THE BOX); ALSO I THINK MY FALLOUT MEME GOT MARKED AS NSFW AS WELL?