Off the top of my head, I have something similar. Not quite fucking kids, but that subreddit's most active member and moderator, Bardfinn, was charged with assault against his ex-wife, who he still sexualizes pubicly. Anyone who points this out is immediately labeled "transphobic" (he's pretending to be a trans woman probably for this very reason).

Now that I think of it, I do remember a case of grooming kids. Idk if this one is actually part of AHS, but s/he is a powermod and part of the DefaultMods cabal, which AHS is an arm of. This user who goes by drewiepoodle kept inviting kids over to get hormones, or "super girl juice" as s/he called it. After people found out drewiepoodle and the rest of the cabal (including the admins) tried to cover it up as a joke, but it was actually real because a disabled kid on reddit actually got hormones from this person and the kid's mother was outraged that reddit's management would groom an unsuspecting kid like that. I won't disclose the username of this kid, but I had known them on reddit for quite some time before the incident, and also afterward, and we're talking about a genuine person here, not some troll making up stories.

Also, the former admin Aimee Challenor has a history of sexual abuse, including towards kids. And the former CEO Ellen Pao is linked to Jeffery Epstein and Ghislaine Maxwell, who is almost certainly a reddit cabal member known as maxwellhill.