It may sound very stupid but it may be usfull to put the Administrator Panel in some lenguage that no many people understand to dificult the hacker to change things.... of course for the administrator it will dificult too, but you do no need to change every day configs.

in this spanish comunity http://foros.teleportmedia.com/index.php , the Admin sad once than he has the Administrator Panel in russian to dificult to change the forum.