you know, there is a PERFECTLY reasonable solution to both the ethical concern I have and the rules... when editing a post there should be a note attached that says:
This post has been edited by moderator -- insert name here --
but I doubt they're willing to do that either (not even saying they should have to say why, just acknowledge they've left their footprint on the post)
Members recieve an auto-PM including the moderators name when an edit or deletion is done, and any reasoning provided within that message.