1: I think it is essential for a moderator to move a photo from public to private according to site regulations.
2: it would be really useful and functional after a moderator has performed an action, for example, delete a picture or move a photo from an album pubblcio owners, the moderator should have a text box in which to write the motivation of his action, the message it should be received on both the email and is in moderate user chat.
que I believe these functions are useful for everyone.