Tried reCaptcha previously. In fact, reCaptcha is included with phpBB by default. Doesn't work. As far as I know, the spammers are now real humans operating in 3rd world countries where they can paid peanuts for solving these puzzles. You gotta make the questions really difficult and not worth their while in order to stop them. Having simple, google-able questions such as "What is the capitol of Australia?" doesn't work either. I have tried them all!
↧