There is also a rubbernecking issue where certain participants take a bit too much glee in the explaining and justification and meta-commentary that goes along with detailed explanations for moderator actions.
Generalized explanations of common mod events that can be added to the bbs guidelines are always good.
As I said I think this process should be biased toward the regulars since they have the most stake in what is happening versus, say, some hot button issue drive-by rando that demands a mod explanation.