This is a good idea but would require some additional code. The good thing is that the admins are unix system guys but the bad new is they have full time jobs.
If people used the forum thread that once existed (started by me and delted by...) then moderators can still get to offensive images in a timely manner. It also enables discussion.
I was majorly pissed off when the Kari Byron image was removed. That required admin intervention. Then there was the "One in the pink" but it could not be fully recovered. All moderators have made mistakes but these were hate crimes.
I deleted some of PJ's nude art (months ago), not because I thought it was bad but I was just in auto pilot but I managed to find it and restore it after he complained in the forum.