On message. Facebook wants to combine the back ends of its three messaging systems: Facebook Messenger, Instagram, and Whatsapp. That would mean end-to-end encryption for all messages on the mixed platform. Sounds great, right? Obviously, not everyone is thrilled with this idea. Some are concerned that this plan could run afoul of antitrust rules. To be clear, you probably wouldn’t notice the change, until Facebook Messenger offered to let you communicate directly with WhatsApp users.