That is Moxie's main point, full disk encryption should be used everywhere, and encrypting Signal's message database on Android is purely due to full disk encryption on Android being a steaming pile or bricking your phone.
Yes, but the point is, if those people don't use ecryption, then they have a problem anyway - and if they do, but their system is compromised, than the attacker gets anything anyway.
In either case, I think Signal's job is to secure the messages going out and coming in and not protecting the disk.
