@Gargron What difference does it makes if the private messages here aren't still encrypted and can be accessed by the 3-letter US organizations as they wish even without your knowledge?
They can harvest anything, any data about anyone they want from here and we all know exactly that something like this is possible. The weakest link is always the human. And if your moderators can read them, so can anyone else. Accidentally and on purpose. Even forcefully. That's pretty obvious. So.. you know.