And then there's the unexpected option of hiding in a bush and shooting the cop :P
Very sound logic actually. What if, there is territories A, B, and C?
Territory A has a doubleborder on B and C. The opponent predicts that the player will strike territory B, since it is the most strategically viable. Because of this, the opponent plays an order delay card, creates a stack in Territory C, and on last order attacks Territory A.
But, Opponent predicted wrong. The player didn't attack at all! Instead, he just built his stack, and the opponent got stackwiped since they predicted incorrectly. A third option, like you suggest.
Maybe this only makes sense in my head, or I overthought it too much ;_;