Here's my solution: rerecaptcha. 1) Own or work with a very popular site with people filling captchas often 2) Instead of showing a full random captcha, use t

Here's my solution: rerecaptcha. 1) Own or work with a very popular site with people filling captchas often 2) Instead of showing a full random captcha, use the recaptcha technique against itself: show a small random captcha alongside a full recaptcha that you want to break 3) Use the random known captcha for validation and profit from the user entered recaptcha