/** Log out the user. Default implementation is no authentication so logout is ignored
	* @param Exception $exception if security threat, or null if normal logout
	*/ 
	function logOut($exception=null) {
			if ($exception) {
			$actionTickets =& $this->sessionVar('pntActionTickets');
			$actionTickets = null;
			//? $scout->clearFootprints(); NYI, may not be a good idea
		}
	}