I think it was Bardfinn himself who posted this in AHS recently:
It's the link to file a moderator complaint.
Whatever anyone thinks of AHS in general, it's clear that Bardfinn in particular is abusing moderator status to harass other subs and redditors. The sub could actually be useful to keep actually dangerous hate off Reddit, but instead it has turned into 'against subreddits we hate'
If anyone who sees this decides to file a complaint, make it valid, not just random complaining. Bardfinn does not hesitate to brag about how he cyberstalks, tags, and misuses Reddit's API, so it is not hard to find actual examples of this on Reddit that can be used to back up a complaint.
The point is not to harass him or the admins, or to spam false reports, but to report actual bad moderator behavior by him or other AHS mods.