By making the solutions so simple that they pick them because they don't care either way, but make it slightly more annoying for people still on non-end-to-end crypto services to communicate with those who are.
If there's enough people who care, then hopefully network effects would slowly take care of the rest.
> How do we do that when people don't care about privacy?
the same way governments / politicians / mass media do it: you make them care.
it's a sad fact of humanity that most people will care about whatever they are told to care about, or rather, whatever their peers are perceived to care about.
right now there is a window of opportunity for privacy to stand in the public eye's spotlight, fighting a (very real) fight against the encroaching forces of totalitarianism.
you ask what to do. how about anything you see an opportunity to. educate your friends about privacy, about what is going on, about what the dangers of surveillance are[0], or perhaps educate yourself about using GPG, get the hang of it together with a few other techie friends, so that you can explain it to more people (because it's really not that complex, if someone walks you through it), if you have a brilliant idea write some code, etc. and also, delete Facebook?
