New answers tagged captcha
In the case of showing an image and giving the user a choice to correctly name it; a bot will have a (in the example case 30%) chance at a guess. You want the user to have to enter the answer by hand, and not select it, for that reason.
In this case, you're looking for alternatives to Captcha first and foremost. Perhaps have a look into this solution, where some coding smarts are used to determine whether or not someone is a bot. I believe it's called a "honey pot". You'll also find some good solutions in this article, and here's another one. Basically, you're trying to trick the bot ...
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