Here are the guidelines used on the Burning Man Facebook page; I wonder when I'll be asked to moderate along these lines. The stay on topic? Yikes.
http://blog.burningman.com/comment-policy/
Comment Policy for the Burning Blog & the Burning Man Facebook Page
[i]Burning Man values the spirit of a civil community discourse. We think that a lively, on-topic public conversation is one of the best reasons to write and host a Facebook page and a blog, and that a blog without comments is more or less just another webpage.
That said, we also have a responsibility to maintain this space for the benefit of all our visitors. The comments made on this blog will have the power add to or detract from the Burning Blog’s general vibe, and it is our responsibility to see to it that they serve to enhance the experience of our visitors, rather than chasing them away.
That means that we expect commenters to identify themselves in their posts, and conduct themselves as they would as guests at a party, where spirited conversation is welcome, but unruly and rude behavior is not. It also means that our moderators can and will remove posts that they believe run counter to the spirit of civil discourse.
This page is our attempt to give you some idea of what we mean by “civil discourseâ€
I'm too jaded to think up a good sig-line. Need more coffee.