There's no such thing as objective moral and ethical good. To me, Mitnick is a hero deserving of the highest praise. He inspired myself and many others to get started in this world. It may be difficult to understand if you didn't come into computers in the late 80s/90s.
I'm curious how your framework handles some particularly unpleasant examples.
E.g., is there nothing universally wrong with what Hitler / Mengele did to Jews? Or how about raping, torturing, and then killing toddlers?
I have trouble accepting an ethics in which there's no real basis for telling such people that what they're doing is genuinely wrong.
(I apologize if these examples seem like straw-men. It's possible I don't understand your original point.)