I was wondering something like this but in a different capacity.
What with certain countries (they know who they are) and their hatred for encryption, it got me wondering how people would communicate securely if - for example - Signal/WhatsApp/etc. pulled out and the country wound up disconnecting the submarine cables to "keep $MORAL_PANIC_OF_THE_DAY safe."
How would people communicate securely and privately in a domestic situation like that?
In person or not at all.
At that point you've essentially lost.
You either hope another country sees value in spreading you some democracy, or you rise up and hope others join you.
Or not and you accept the protection the state is graciously providing to you.
SneakerNet or bust, eh? That sucks.
Encrypted hand written notes tied to pigeons