I can just recommend all to block them and get the word out to as many big images companies as possible. It dossent iven have to be a image related site, as long they have a few large images. Dont forget to mention Bing to.
we should all try to bring Getty Images, PrPhotos, Infphoto and other image companies. Our client can't renew his contract with these companies, if Google continues to kill image based business like this.