It turns out this is one of the core problems with Mechanical Turk that drives folks to MobileWorks instead. In Turk, users spend so much time implementing pro

It turns out this is one of the core problems with Mechanical Turk that drives folks to MobileWorks instead. In Turk, users spend so much time implementing protection against malicious workers and bots that they need to develop real expertise in crowdsourcing in order to be able to outsource their work effectively. We've filtered workers more effectively up front and reduced the incentive to cheat substantially, so things largely just work.