We, by which I mean some loose group of people who want decentralized tools to thrive should also be building things for secure, private communication, and we are. Matrix, for example offers strongly end-to-end encrypted federated chat rooms and private messages. It also has a kind of rough UX and, IIRC resource-intensive server software. We should work toward improving that.

I'm not advocating against privacy at all. I want people to understand as clearly as possible that Mastodon, Lemmy, and anything that works like them isn't private and can't be private when part of an open federated network so they can decide whether that's a good fit for how they're using it. The block evasion described in the link is just run a server on a domain that isn't blocked, and I imagine any other mitigations bolted onto Mastodon that don't break open federation will be little better.