Neat idea. Unfortunately, one that's quite easy to side-step since EXIF data is easily removed from a photo file. Indeed, it's often lost by any modification of the image in software. Of course, if someone doesn't know any better (i.e. most of "joe public") and uploads the original file, bingo! I guess it only takes one file, with the EXIF data intact, to work - so it can't be a bad thing.
Zorki: 1e (x2), 2C, 3M, 4, 4K, 5, 6
FED: NKVD, 1g, 2e, 3a, 3b, 4L (x2), 5B, 5C
Kiev 4, 4A
Yashica Minister III
Zenith C, Zenit C, Zenit E
Minolta XG M, Z1
"The way to see by faith is to shut the eye of reason."- Benjamin Franklin