The difference being that there's way too much necessary legitimate use of cryptography to stop now, and as the traffic is encrypted, you can't tell what traffi

The difference being that there's way too much necessary legitimate use of cryptography to stop now, and as the traffic is encrypted, you can't tell what traffic isn't legitimate. Plus steganography and plenty of places accessible on the net that aren't the United States. This isn't meatspace, the dynamics are quite different.