No, but the idea advanced by ~fidotron, in the comment to which I was specifically replying, was that big companies like Google and Facebook will fight secure c

No, but the idea advanced by ~fidotron, in the comment to which I was specifically replying, was that big companies like Google and Facebook will fight secure communications because they're dependent on viewing users' communications to make money. They're not; other more-public or inherently-shared signals are far more important drivers of profit for them. Their businesses leave them plenty of room to be allies in a drive for secure communication. (Pressure from their governments is of course another matter. But their business models are not a major problem.)