title: How can I collect the ID's of Facebook users who like a 'post' in my fan page?
body: <p>I just finished a Facebook contest event and want to invite all visitors to see the results.</p>
  
  <p>It will be much simpler if I can configure the Facebook page to only accept users who 'fan', 'like', or 'comment' on a post on my fan page. </p>
  
  <p>Is there any way to collect all the Facebook users who have 'liked' or 'commented' the related 'post' on my Facebook fan page?</p>