You couldn't even quickly stream a good set of photos from your camera in many parts of the western world. It's an interesting solution when it fits, and WLAN memory cards and cameras with WLAN are available for that, but once you go more clandestine or remote it is likely not an option.

If you have access to a slow connection once per day or every few days, or a fast connection to return to you have to carry material with you for at least some time, in which you'd want it to be encrypted, and could easily use a secondary device to actually transmit it (phone, laptop). And material that is to large probably still needs walking out. If you are in a "going to visit Snowden" (or staying with any other target in hiding) scenario, you are probably travelling without a connection for their safety, otherwise you are not going to get access.

In remote locations you are limited to sat phones which are expensive, slow and probably monitored, if you even are allowed to possess one. And their security is debatable for all I know.

What I dislike about the suggestion for standard encryption features is that it becomes sort of obvious that there might be encrypted data and how to destroy it. Ways of hiding it are even more important, and obviously can't be "standard". Tricky to solve.

//EDIT: removed uncivil language