Ambiguity: "Thou shalt not murder"? Well, is that killing I just did *really* murder, or just killing? What if it was an accident? What if he was trying to kill me? What if he just threatened to kill me? What if my property (dog) killed him? What if I told my dog to kill him?
Lawyers: Lawyers are multipliers of ambiguity.
Politicians: Politicians look like they're doing something by passing a law, even if it's a law that doesn't actually do what they hope or claim it will. When you have a hammer, every problem looks like a nail.