Not that long ago the answer was obvious. But today, with the advent of face recognition technology coupled with artificial intelligence, it’s not that clear anymore.
Cameras can recognize our face, match it to an existing database, and then match all the personal data that has been collected about us (a lot more than we dare to admit). In the past we typically would only have given the Department of Motor Vehicles the permission to take a picture of our face in order to issue a driver’s license. But now any number of corporations will do the same without our permission in order to benefit from the data.