Whatsapp is a much different product and atm everything is end-to-end encrypted, so I trust that more than facebook itself. There is also little binding to the

Whatsapp is a much different product and atm everything is end-to-end encrypted, so I trust that more than facebook itself. There is also little binding to the service, the entire semester could switch to a new service within a week (we've played out the scenario "what if whatsapp goes belly up" as part of a course)