I hate Captcha technologies. Captcha is the antithesis of usability. Rather than making it easy for users, the technology purposely interrupts users so it can thwart hacking scripts. Not to mention that CAPTCHA is bypassed by newer crowdsourcing and OCR technologies.
CAPTCHA: Completely Automated Public Turing Test to Tell Computers and Humans Apart
Thankfully, someone else thinks it's terrible as well. Confident Technologies have invented a new means of authenticating users while blocking hacking scripts called Confident CAPTCHA.
Confident CAPTCHA™ is a clickable, picture CAPTCHA that stops spam and bots on websites by asking visitors to click on specific pictures. Confident CAPTCHA is a better alternative to CAPTCHA – stops spam and bots on blogs, web forms, account registrations, ticketing sites and more, ending user frustration, reducing website abandonment, and increasing conversion rates.
Confident CAPTCHA™ is ideal for mobile websites and mobile devices including smartphones and tablets. Plugins are available for PHP, Java, ASP.NET, Python, WordPress, Drupal and Joomla. The service can be deployed using their Software as a Service (SaaS) or through the purchase of a virtual appliance. It can also be white labeled as a component within other enterprise solutions.