[golergka]

Also, federalizing social networks. I know that Mastodon exists, but the impossible part would be making something like that truly popular.

Also, speaking of social networks - giving people the ability to automatically sync their charity contributions to their public social profiles, as in "I'm donating 7% of my income to these causes, and 3% to those" (using some properly designed API from tax authorities) and making it popular enough so that most part of the population is socially nudged to some accepted level of regular charity donations. In my libertarian fantasy, it would gradually replace taxes, but yeah, I'm aware of how idealistic and far-fetched that sounds.

[ardit33]

Not going to work, unless there is a certain way to have 'one person one account' type of tech, or make account creation very expensive.

Today Email is effectively federalized, but in practice, unless you have some major spam technology, your inbox will be filled with spam as soon as your email becomes public. Same thing is going to happen with decentralized social netowrks.