@scottjenson My take (which seems to fly in the face of the zeitgeist) is that Mastodon is not meant foremost as a private messaging app. It is at its core, an *open, social* microposting platform. There are apps that are radically better suited for private and safe comms, and I am a huge proponent of letting things be true to themselves. When you try to shoehorn stuff into a system not intended to do that stuff, it ends poorly.
So, sure, DMs out of the timeline, but no Signal-like hardening.