That wouldn't work. Lets say a user uploads a nude picture, I wouldn't know about this intill someone told me about it or I found it by going though the galleries. I rather take the 5 secs to approve each picture then taking the risk of having un-wanted pictures in the gallery.
yeah... we don't want no nudy pics of chowdown.....

It's a good concept, but are you the only one that approves them? or does someone else have the previlage?