Does anyone really think that someone made the decision to manually decay the orbit with a rocket by chance. That there wasn't months of analysis that went into the decision.
We were upset at the chinese because they didn't just shoot at their own birds, they targeted a few of ours.
http://www.economist.com/science/displaystory.cfm?story_id=10533205
The real question is do you want the paylod to be dissected by a foreign power, if it did make it al the way back. Not to reproduce it but to understand the capabilities.
In the art of war its not just being able to copy the enemy but to accurately know what they are capable of in order to determine effective countermeasure.