I have been looking for a good way to deal with some of these that I receive as email messages from friends and family. I have been posting some of them on my blog, trying to determine in the photo is real, whether their explanation is real, (the "rainbow tornado" and hurricane flooded street ones come to mind), and crediting/linking to the appropriate photographer's website.
Unfortunately, when I do a TinEye search on many of these photos, I get links to Pintrest and other photodump sites. Do you guys have a better search engine for finding the proper owner of these photos?