Is doing math a form of expression? Breaking a password amounts to thinking for a very long time about all the ways you could rearrange some bits, and choosing one. I'd call it an expression of preference for certain possible results over others, by way of saving one and letting the rest go.
I know, I'm laughing at the thought of framing a cracked password because you're so proud of your expressive art. Still, I am deeply uncomfortable with a government having the authority to say, "You may not run that program."