Luckily BBS software still exists...
And with that I'm not referring to visiting a BBS to download software and such, I'm of course referring to the whole 'echomail' (comparable to UseNet) and 'netmail' (e-mail) structures.
A mere mail client such as timEd (or the better known GoldEd) is enough to actually read & write messages, then you need a mailer & tosser (I used 'Portal of Power' and 'FMail' in the days) which can package up ('toss') and send (the mailer part) all your stuff across a regular phone line. Of course a modem would come in handy too.
Sure; its not real time, but its the one thing a government won't be able to block on a whim. Well, they could but usually they won't; people are granted phone access. And should worse come to worst; in "our" days we could fit a /whole/ lot of mail material (echomail & netmail alike) onto a single 1.44" floppy. Now try to imagine what you can achieve with a common memory stick ?
Worst case: you smuggle the whole thing across a border or, if international calls are possible, setup a so called "FidoNet <-> Internet relay". That will make sure that 'netmail' gets converted to regular e-mail and echomail... well, you do the math :-)
So while things might look totally hopeless for some youngsters there are actually still plenty of options left for electronic communication. Even mass-communication if you want to.
The main downside, obviously, is the latency. This won't be real time, but if you setup a good infrastructure then who cares if an e-mail takes more than a week to get answered?
(that was the time it took for my very first netmail ("e-mail") to be answered which I send using FidoNet to a friend of mine)