Captchas, especially visual ones that rely on image recognition have always been a controversial idea; but the truth is that we're in a pretty bad situation with comment spam, and other forms of automated bot attacks, and this looks like the only trick in the book that's (somewhat) effective. I have a tiny hand in this mess, I'm the author of the quickly and dirtily written, ill maintained captcha module for Drupal. It sounds like a war cry in a HongKong action flick, but PWNtcha - captcha decoder, stands for "Pretend We