I thought that BillMC could be a cultist, from this Day 1 post:
This suggestion of the patsy making a 5 person masonry doesn’t make sense. To me it looked like a crumb, a description of the 5 person cult. Although BillMC’s subsequent posts also made him look less and less like a cultist.
But BillMC turned out to be a wolf, and Sunny Daze mafia. It’s fair to say that they were not cooperating in a scum ploy.
I’ll add that, despite these accidental crumbs, I still find sachertorte’s crumbs convincing.