That's fine, but unless they're going to ban all (user generated) high bandwidth media as well, they're going to have a hard time (at least without deeply backd

That's fine, but unless they're going to ban all (user generated) high bandwidth media as well, they're going to have a hard time (at least without deeply backdoored perpetually networked processors). Finding the optimal encoding for some piece of data is extraordinarily hard (I suspect NP complete, but I don't have any resources to back myself up), so it should be comparably difficult to prove that deliberate and (relatively) low bandwidth inoptimalities are intentional - it is very hard to prove the existence of an encrypted steganographic channel within some high bandwidth data stream. It's a game of cat and mouse in which the mouse is going to get increasingly good at turning invisible.