> I don't see how this can actually be solved, since most people aren't concerne...

> I don't see how this can actually be solved, since most people aren't concerned about encrypting their communications.

They shouldn't need to be. Encryption is cheap, it should happen automatically behind users backs by default.

> I can't use encryption to message other people unless they use encryption too.

Build the next WhatsApp/Facebook/GMail and integrate encryption to it.