To play devil's advocate: "* There's no incentive whatsoever to "sneak something in" and if you do so maliciously you'll be fired and maybe prosecuted dependin

To play devil's advocate: "* There's no incentive whatsoever to "sneak something in" and if you do so maliciously you'll be fired and maybe prosecuted depending on the damage." How would you discover the snuck in code in a timely fashion?