This would be pretty easy to test. Just get a bunch of friends to start exchanging encrypted messages about bombing an embassy or govt office. If these douche-bags can break it, they'd be on you like white on rice.
Haha, that's actually a nice thing to do
But you would only see if the encryption you're using is flawed or broken. It wouldn't say a whole lot about the mathematical hashing functions of Bitcoin that protect it! You'd need to test or break them!