PremEx, I don't agree. There are other boards with which I'm familiar which operate this way, with moderation largely hidden from view/mysterious, and what I find happens is that the lack of discussion and openness can lead to charges that the moderators are being unfair/preferential/arrogant. And when one of the known guidelines is simply "don't piss off the moderator," you know you're somewhere where moderation is less than professional and arbitrary.
I don't think that's the kind of board we want here, though I suppose I could be in the minority.