Validate User with Image Verification.

i.e. print a distorted image of some letters and numbers such that registration can only be performed by humans.

Raised in VerifyValidEmail by JamesSparenberg

A "number image" type of verification during registration to defeat automated registration.

-- MartinCleaver - 30 Jan 2005

This technology is called Captcha. See VisualConfirmPlugin.

-- PeterThoeny - 30 Jan 2005