There’s also a new “Enable audio and video calling” toggle within the app’s settings, which says you can “turn the feature on and then select who you’re comfortable using it with.” It includes options to allow audio and video calls from only people in your address book, people you follow, verified users, or all three.
Five bucks says that when basically no one enables this it will be turned on by default for everyone to receive calls from verified users within the next 8 weeks.
Oh and the only way to turn it off will to be a verified user...