Are there any steganographic content sites running now? One could probably run HTML/images only sites purely through steganographically disguised data on imgur, tumblr, Facebook, and others. (Images would be lowered resolution, and involve the combination of 2 or 3 images.) A secret browser extension would be needed for recombination. This browser extension could come in multiple variants, in such a way that it would be hard for one agency to know all of the content channels.