@mike you know what I think would be an awesome idea? That somehow Mastodon would integrate PGP keys and you could send encrypted "private" posts between users.
It is just a morning thought so I don't have details how @Gargron could make it work, but the jest of it would be that those that if both parties added their public key to their profile would automatically start using it when sending anything other then public posts ?
Client software should handle the private key? ¯\_(ツ)_/¯