Permanently Deleted

There's literally no advantage or reason I can think of for them to do this other than it seems cool because it's like, underground and word of mouth or some shit. SMS is one of the least secure forms of internet communication, I would rather use Facebook than SMS for security/privacy

Tell them to just throw everybody in a Signal/WhatsApp/Messenger group chat or a Slack channel. Ask them directly to reveal what the purpose of this form of communication is and let them know why it's not a good idea

Internet/data privacy and security within the imperial core doesn't really exist unless you actually know what you're doing with Tails, VPNs, and general real life security practices anyways