For me it´s not a theory, thats what I said in my comment and I´m pretty sure they ARE actually using these articles to discourage people from using encryption.
Your idea of seeding some /dev/random or attaching some /dev/random to emails sounds like a great idea, and also funny, to me. We should definitely do that!
Actually, if enough of these spring up on various trackers, chances are some real terrorist organization may actually end up making one of these files (but with actual information).
Alternatively, we could set up a mesh of dropbox/cloud accounts. People would connect in pairs and generate their own huge files of garbage. Then they would copy it into each of their dropbox directories and it would propagate n times. If everyone does this every day (write a script to generate random data), there will be a continuous stream of randomly encrypted files across the network. When your cloud drive fills up, delete older files.
Your idea of seeding some /dev/random or attaching some /dev/random to emails sounds like a great idea, and also funny, to me. We should definitely do that!