Developing a Captcha system for this website
This site is developing a Captcha system of its own, you can peer at it at: [a href="" target="_blank" ][/a]
I am not installing a system but developing a script for it, with php that is a quite feasible task This site feature several services, most require to be logged in. But some services might require to be not login in, such as polls those also are better if the user can be anonymous. In the polls example and others the captcha system might be helpful to prevent abuse.