The UK conservative government ran a lot of meetings on whatsapp because they believed it was secure and unarchived, i.e. could escape the normal retention requ

The UK conservative government ran a lot of meetings on whatsapp because they believed it was secure and unarchived, i.e. could escape the normal retention requirements. Of course what happened is that once the chat got large enough and the government fractious enough, people started leaking messages by screenshot. When trying to avoid subpoenas of data on the device itself, it's important to frequently "lose" the phone with the messages on.