If (when) they get the power to edit or delete posts etc. I would like to know who was doing that.
For that, we'd need to be able to edit posts in the first place ;) I can't remember ever having seen a post which had been edited ("censored", "cleaned up") by Fizzer himself, so I'm pretty sure the forum software currently doesn't support it at all. (Of course, he can outright delete messages.)
If / when editing becomes available, I think it would be a good idea to show one of those "This post was last edited by $username on $timestamp, edited $count times in total." lines below each post which has ever been edited. Sure, you can still hide what you wrote before (which is probably exactly what you want for a mod-edit to begin with), but at least you can't hide there was
an edit (and you can't hide who did the editing).