I don’t know why this gets downvoted. Xmpp is my solution as well. Lightweight, selfhostable and federated, it’s just a great solution. Briar is good as well and probably one of the best solutions if your are an activist/journalist. But it will eat your battery as all p2p solutions will. Is you host your own xmpp server at home, that’s really as secure as it will get imho.

I think it’s pretty cool this issue is actually addressed in the witcher (action rpg). At the very end you get confronted by Death (personified). He blames you for all the pain and suffering you caused and that he has to follow your footsteps wherever you go and asks you to give up as the world would be a better place without you. You can decide to give in or to fight him, if I remember correctly. It’s really one of my favourite moments in video games history and really worth considering the good you as the witcher have done vs the pain you caused. If you think it’s moral to measure life vs life you can definitely share Deaths opinion.

The witcher still holds up today and I think is worth playing if you haven’t yet.

There is already a really good foss app that does exactly that, it’s called briar and is as secure and private as it gets. The downside with p2p communication apps being, that they eat your phones battery for breakfast. Still a good option for activists or journalists I think. It’s a good way to get around the “server in the middle” problem. Still more convenient to run your own (xmpp) server at home imho…