I saw way more harm in the engineer using the phone to pay for lunch at the cafeteria and mention that he worked on that feature. Was that cashier under the sa

I saw way more harm in the engineer using the phone to pay for lunch at the cafeteria and mention that he worked on that feature. Was that cashier under the same NDA? Now he's seen it and can leak the design to the world and nobody would know. Or were there dozens of these prototypes running around the Apple campus and everyone (including contractors and guests) knows to look the other way?