title: It is possible to make a HoneyComb activity unclosable?
body: <p>I'm developing a presentation style application for HoneyComb Tablets. At one stage the tablet may be passed around a room for people to interact with. If possible I would like to prevent malicious users from navigating away from the current activity.</p>
  
  <p>So far I have overwritten the <code>onBackPressed()</code> to prevent finishing the activity but users can still press the other buttons on the status bar and also leave the app via notifications that pop up.</p>
  
  <p>Any suggestions or possible solutions?</p>
  
  <p>Thanks</p>