Lenstag helps photographers find stolen lenses and images

Of course, one can easily delete or manipulate EXIF data. But I doubt that this would play a big role for stolen equipment. The photos around on the web will most likely not be posted by the thief himself. They rather will be posted by a buyer of used equipment, not aware that it was stolen. So he/she sees no reason to change the EXIF data. For stolen images, however, I think this will be a different story.