title: Writing to a Facebook event wall raises "error #210: user is not visible"
body: <p>I am trying to post a message to an event wall <code>https://graph.facebook.com/&lt;EVENTID&gt;/feed</code> with message parameter in the <code>POST</code>.</p>
  
  <p>I have a valid access token from the user which has <code>publish_stream</code>, <code>friends_events</code>, <code>offline_access</code> permissions. I am getting this error consistently. </p>
  
  <blockquote>
    <p>{"error":{"message":"(#210) User not visible","type":"OAuthException","code":210}}</p>
  </blockquote>
  
  <p>What am I missing? </p>