Jeff Schmidt's book Disciplined Minds discusses how to survive graduate education while keeping your original identity and ethics roughly intact. The book has some advice for how to operate as an activist in a professional role within an organisation, where your goals are quite different to the org's goals. Not quite what you're looking for, but a pretty interesting read: http://disciplinedminds.tripod.com/

another angle: ignore the developer aspect specifically and get involved with civil disobedience to aid existing groups that you wish to support, and gain experience on how to operate.

Organize people. Start with a small group, and focus on a small project. Grow that thing.

Start where you work.

Participate and start discussions around ethics when your company engages in something questionable. You don’t have to threaten your job, but you don’t have to accept as business as usual without any critical thinking.

Persuade your colleagues to do the same and lead by example.

Or just quit, if you’re working for Facebook. Insanely smart software engineers are not plentiful. If enough people declined to work for Facebook, they will be feeling an impact in their bottom line and scalability.

We once had a flood knock out telco lines all over a state. Firechat was an option but nobody knew about it. What needs to happen is more education regarding these tools.

Beautiful question, yet even now I am still unable to answer this for myself.

Start solo. I read the laws know the laws. Plan on getting arrested. Don’t insult anyone instead insult yourself. Write your message out(have a script)

Cryprocurrencies

Can you elaborate? What measures involving cryptocurrencies, specifically?

Promotion, creating onramps