May I suggest that the new approve-a-comment software seems ideally placed for any meta-thread talking about moderator actions. I would love to see why a moderator took action, and even some valuable commentary on that - but the ability to vote to stop such a thread degenerating into uselessness seems the best use of self-policing.

The silent majority want HN to be the best it can be - and we are quite willing to help, as long as it's not that much effort :-)