Plugins - negative_captcha
Add to favoritesBy using hashed form field names and hidden honeypot fields, Negative Captchas can prevent bots from submitting forms, while significantly reducing false positive rates and eliminating user inconvenience.
The negative_captcha Rails plugin provides helpers to create and validate negative captcha forms.
http://subwindow.com/articles/18
git://github.com/subwindow/negative-captcha.git
Rails' (MIT)
View Extensions
