ManOnDaMoon
Well-known member
I have read about XRumer "learning system" that is a bit more complex (btw, it is scary how they intend to pay their users for solved Q&A they share).Any bot can read numbers...so I think this idea won´t work. That´s why many bots read on q&a systems "which color red" and they just try to answer red. Many times they have success
By randomizing the answer and moving it elsewhere in the page (in footer, in a js popup,...), I believe it could be possible to confuse the software (not the people, of course). And of course, numbers are not a viable solution, but randomly generated alpha+num keys that a standard user can copy-paste are still not too close from being forbidding.