North Korea has a black market that runs under some free market principles. Knowing them won't hurt you if you live in NK.
Sure, I'm prepared to grant you that, I am not familiar with the country that well. But are you saying that there are no cases where knowing the territory can be harmful?
Here is a presentation on the map and territory I'm planning on giving to my game theory class.
It's based on Liron's You Are A Brain post.
Any suggestions for improvements?