I've been researching methods to keep bots away from stuffing my registration form and the only thing I've seen that could be effective is CAPTCHA (Authen::Captcha). However with todays technology, even the best methods can be thwarted with a bot that has really good OCR capabilities. While we have some individuals who champion this there are far more others who look down on this method because the accessability of a site goes right out the window when a CAPTCHA is implemented. The blind can not read images. So how would we go about thwarting bots from our forms while still keeping things accessable so no one makes a big stink?