title: How to prevent a CheckBox from being checked?
body: <p>I would like to be able to prevent a CheckBox from being selected (or to set it back to unselected), when the CheckBox is clicked</p>
  
  <p>How can I achieve this?</p>
  
  <p>I do not want to simply disable the checkbox. I want the user to think it is checkable, but when the user tries to check it... then I will (possibly) prevent the checkbox from being checked and display a message.</p>