While NK is probably not looking to merge their `char/icbm` driver to the mainline tree, what about the NK military fixing a nasty bug in the memory allocator? Should the patch be rejected even if it improves a non-military subsystem, just because of who wrote it?
It's just food-for-thought, personally I do not care one way or the other. As you say, it's all a grey area, and there is not a clear answer, which is where politics and posturing, rather than pragmatism, thrives.