Just going to mention Horrorfan for watching.
Nothing overt in the few of their posts I’ve seen, but they meet our returning poster patterns.
I mean per their profile, they’re a 20-something posting on an old fashioned message board with a ton of confidence although they just joined 2/4 days ago (summary info is inconsistent).
But I am not at this time making any accusations, because compared to MOST of the people who fit the pattern, they read quite a lot - 6 hours in 4 days, over a thousand posts so far. Not that some of our more obsessive repeats don’t do the same. So it’s an honest suggestion that we all watch, and hope that it’s a false positive.