CAPTCHA is one of the most used and hated pieces of technology on the web. It almost defines the term "necessary evil" while driving website visitors completely insane. Webmasters love the fact that it can cut spam on their sites to almost nothing, and website visitors sometimes completely abandon their form submissions over frustratingly garbled words and numbers.
People have lamented over and over, "There must be another way!" Well, there are other ways, and we'll look at one in this article. This alternative, however, could be just as controversial as CAPTCHA itself.