This question already has an answer here:
In a strange twist of events, I got this error that said that my edits couldn't be submitted because I needed the moderator tag featured. I'm not a moderator, so I just decided to humor the system.
And now there's this random old FAQ that's featured on SFF meta as a result (Where can I ask questions that aren't Science Fiction & Fantasy Stack Exchange questions?). It's even showing up in the sidebar:
Here is a screenshot of the changes, which don't show me adding the tag, but I did:
I'm not sure why this happened, but I will note that it's a community wiki faq question and the previous revisions were all done by an ex-moderator whose account is now deleted.
I can't add any red tags here on MSE though.