One day I looked at it, not logged in.

Turned out there was a post, "pinned by moderators", at the top of the post list, exhorting people to join the sub lounge - that real-time chat thing Reddit was pushing.

I never made that post, nor did I approve it, nor did I ever see it in the mod list of posts.

I logged in, and went to the mod list of posts - and lo and behold, somehow pinned to the bottom of the list of posts, so before the oldest post, is this post.

Reddit made that post, pushed it into my sub, pinned it, and hid it from me, not only by forcing it last in the list of posts, but also because when I log in as admin, the post is not shown to me!

Bloody hell.

At that point I knew Reddit could not be trusted.