I wonder what rate of false negatives is, in terms of assigning Greyball status to someone who is not in fact a local official conducting a sting operation.

Picture a 19-year-old woman in college whose dad convinced her to put Uber on her phone so she'd have a way to get home safely at night -- and linked her account up to his credit card so she wouldn't worry about having to afford the ride.

Now picture her leaving a house party drunk at 2am. The party happens to be close to city government offices, and her dad's a cop and his credit card tracks back to a police credit union. She opens the app and tries to get a car, but there are no cars. Or there are lots of cars, but none will give her a ride.

A low-probability edge case, to be sure, but I wonder if Uber considered the possibility?