Jeff from coding horror for a long time used a very very simple "CAPTCHA". You just had to enter 42 (if I recall correctly), and it was always just that, nothin

Jeff from coding horror for a long time used a very very simple "CAPTCHA". You just had to enter 42 (if I recall correctly), and it was always just that, nothing random. It served him well, and he has a high traffic site (http://www.codinghorror.com/blog/2006/10/captcha-effectiveness.html http://www.codinghorror.com/blog/2006/10/captcha-effectivene...)