And will your legal system include only such clear-cut cases as premeditated murder? What do you do when someone starts file-sharing your program? Apply a single, simple, almost certainly ambiguously worded law about theft? And let's pretend your law is perfectly worded so as to have a clear application in every single situation: do you deem file-sharing theft?

What about if, in self-defense, someone goes further than necessary? He's attacked and choked by someone bigger and stronger. He reasonably fears for his life. Through chance or skill, he gets the upper hand, and knocks his attacker out. Then, before caveman adrenaline has faded, he slams the guy's head into the pavement until he dies. Do you apply the single "thou shalt not kill" law?

I don't really want answers to these specific questions, but to the meta-question: how do you handle actions which are harmful to society, but which cannot be resolved by straightforward common-sense ethical reasoning?