If images are used more often, spammers will just start hashing pictures and doing the same with pornographic sites and the current captcha breaking technique of having them identify the object. You compare the hash of the image from the 'gmail' or 'hotmail' account, look it up in your database, and post the lemmings response.
Slashdot Mirror
If images are used more often, spammers will just start hashing pictures and doing the same with pornographic sites and the current captcha breaking technique of having them identify the object. You compare the hash of the image from the 'gmail' or 'hotmail' account, look it up in your database, and post the lemmings response.