Security Question - Protection against Spam

[Batusai]

Hello.

I'd like to know if there's a module to add such a basic but useful anti-spam system.

The idea is to add into any form (registers, send to friend, reserves product, etc...) a field with a simple question to make spambots unable to solve them. For example: You show this text "two plus two are...". The user fills in the word "four" and the application checks it out. If you give the right answer the form is sent.

I've seen it in phpBB3 forums and it seems to be an easy modification, so it must be easy for PS.

Anyone has ever seen any of this?

[guest*]

Yes, there is. As I don't like captchas, I use in all my projects anti-captcha (also named no captcha). Search on Goog. There are only two lines which you paste into your index.php and that's it. anti-captcha works also with and without JS (no captcha). So you can choose what you prefer.
Both stops all automatic generated spam. Spam from humans (hackers) is not possible to stop unless you lock your site for the internet and filter access only for konwn ip's.