> And while that fact makes Mastodon DMs no less safe than Twitter DMs have been this whole time
Oh, it's critical for people to realize that Mastodon/Fediverse DMs are WAY less safe than Twitter DMs this whole time due to the public broadcast nature of ActivityPub.
With Twitter you deal with a single professionally run company. With Fediverse you deal with who knows how many instances run by who knows whom, each with who knows what motivations.
But to this point, I don't think E2EE is particularly compatible with ActivityPub. One would be grafting a new system onto the side of it, so might as well just go with a different system entirely if you need real DMs.