> in self-destructing messages (not that an attacker couldn't disable that, but to avoid there being a giant archive when we do have some sort of compromise
Admitting to that here?
In civilised jurisdictions that should be criminal.
Using cryptography to avoid accountability is wrong. Drug dealing and sex work, OK, but in other businesses? Sounds very crooked to me
They're not sidestepping accountability, or at least we can't infer that from the information volunteered. They're talking about retention, and the less data you retain (subject to local laws), the less data can be leaked in a breach.