Spammers can use automated tools to post many unwanted messages very quickly. To protect a website from their attacks, WorksForWeb added CAPTCHA in all their classifieds scripts including iRealty.
CAPTCHA is a Completely Automated Public Turing test used to ensure that the response is not generated by a computer. Humans can easily pass this test but computers will hopefully fail.
A captcha includes a picture with the distorted and rotated text.
Currently, the captcha is implemented on Contact Us, Contact Seller, Tell Friend, Contact User, and Registration pages. For all these pages the admin can easily turn it on or off.
"Thank your team for all your wonderful customer service and amazing job. There will probably be more customizations once people start using it and wanting more ideas so I will definitely be contacting you then...."
Alan Tuck