What's the point of hacking anyways? Especially in something like zombies.
Its fun. Sometimes its just fun to hack on games, to have that unreal advantage. And the thing about it is, is that its AI, so nobody is being hurt. I play the game legit, and when I am bored will see what I can mess up. Its entertaining to find glitches in the campaign, or sequence breaks, which there is a lot because treyarch failed at scripting events.