There’s not much you can do except advocate for the use of DANE in browsers: this lets site operators pin their certificates in DNS. It is tricky because it is linked to the operation of DNSSEC at the moment. Have a read:

https://en.m.wikipedia.org/wiki/DNS-based_Authentication_of_Named_Entities

Stallman is pretty much one of us, actually. He has a relationship with Cuba, opposes US sanctions, and literally invented copyleft licensing.

Use the search bar on his site for “Cuba”: https://stallman.org/

To be honest, after 20+ years of using Linux and working in tech I’ve concluded it is not the openness of the tech that matters, but the governance of the providers. I’ve been tinkering with running a little ISP doing email, nextcloud hosting, etc, and running it as a cooperative.

That’s to say that the socialist thing is public ownership, and the nearest we can come to that is coops, at the moment. Governing provision is much more interesting on the basis that it enables people who aren’t terminally online to make good choices.