title: Hypothetical question about AJAX/PHP voting systems and Amazon Mechanical Turk
body: <p>I'm not too familiar with Amazon Mechanical Turk, but being a JavaScript/PHP developer, it occurred to me that paying for someone to click through could affect simple voting applications (i.e. Yahoo's OMG voting).</p>
  
  <p>Hypothetically speaking, is there a way or method to validate against clicks from this service and block them? For the sake of the question, let's assume the voting system is using a combo of PHP, AJAX and jQuery.</p>