On my website, I have a simple Guestbook where you leave feedback on the site. Recently, I have been getting comments written in Russian, and when I translate them in Google, it appears they're advertising a porn site.
I'm new to the Web Development world and am of course new to this kind of web security. I've been to CAPTCHA.net but I don't exactly know where to go when I'm there.
I'm not sure if I want the kind of system where it makes visitors read illegible characters. I'd rather have them name an animal, like a giraffe. I want a picture of a giraffe and I want humans to tell me what it is before they can post a comment. So how exactly would I go about doing this?
I'm using phpMyAdmin. Not sure if that matters.