Hard to imagine that there couldn't be any kind of trusted (perhaps encrypted, but not necessarily) communication online. Text conversations are trivial to fak

Hard to imagine that there couldn't be any kind of trusted (perhaps encrypted, but not necessarily) communication online. Text conversations are trivial to fake, and WhatsApp could trivially MITM a handful of conversations and tell me my friend said something different and I'd never know. But they have an incentive not to do this at a large scale, because there are benefits of running a worldwide trusted messaging service, and they would fear people would move to alternatives when millions of messages started being adulterated.