Hide the email addresses on the letter page of an action. Updated to handle blind targeted actions and confirmation pages.

hide_target_email_addresses.html

<script type="text/javascript">
  // See https://help.salsalabs.com/entries/22876904-Hide-email-addresses-on-targeted-actions
  $(document).ready(function() {
      if (RegExp('action_KEY=NNNNN').test(window.location.href)) {
          var checkExist = null;
          var recipientChecker = function() {
              if ($('.recipient').length > 0) {
                  $('.recipient .number').each(function() {
                      var x = $(this).html();
                      x = x.replace(RegExp('Email.+?</span>'), '');
                      $(this).html(x);
                  });
              }
          }
          // Hide the stuff on the front page for blind targeted actions.
          //
          recipientChecker();

          // Runs until the page is exited so that all AJAX-loaded pages are handled.
          //
          checkExist = setInterval(recipientChecker, 200);
      }
  });
</script>