Hi!  There was a similar situation on Yahoo 
auctions a couple of months ago where a seller 
had stole several Sailor Moon cel images and 
posted them up for sale on Yahoo at ridiculously 
low prices (these were cels worth over $150 or 
more!).  

Several people, in the Shoujo Anime Traders club 
on Yahoo, spotted the fakes and reported them to 
the original owner of the cels.  She promptly 
took her gallery down and had to stamp the images 
with her name.  This wasn't the first time it's 
happen to her! 

Anyhow, people that knew the deception bid on the 
auctions to prevent other people, who didn't know 
about the fakes, from bidding.  After the 
auctions ended, they all gave the seller negative 
ratings.  After 8-9 negatives, their account got 
cancelled by Yahoo.  It was really nice of these 
people to risk getting a negative on their 
ratings so that others wouldn't get cheated by 
this slimeball!

I say, keep the gallery up but put your 
name/email on the images to prevent people from 
stealing them!