I've never seen one labeled event either, so... Idk??? I wouldn't add it until we can figure out what it is.
We did have a problem with spam like a while ago but it straightened itself out. However, as you can probably remember there's been a rash of random spam signups who never edit and are eventually culled... But apparently the spam filter isn't working anymore.
Honestly I think we need more wiki admins because when there's a problem (like the "Gracie" user that was adding completely false things to articles dozens of times a day) it takes a few days to resolve. And no one can be on as an admin 24/7... I hope this doesn't come out as pretentious or implying that the current admin aren't doing their jobs or something, I tried to think of a way to word it. I think it's just one or two people spread too thin.