http://HasTheLHCDestroyedTheEarthYet.com/

    <script type="text/javascript"> 
      //Technically, this will be accurate...
      try {
        document.write("NO");
      } catch(err) {
        document.write("YES");
      }
    </script>

IIRC, the /robots.txt (now sadly missing) used to read, ``the robots will not save you''.