It’s also an easy way to discriminate against passengers.
Really: Why would a company rate a passenger, except to potentially deny them service in the future? Consider the many reasons for which an Uber passenger could receive a low rating: minority passengers, people with a sexual orientation different than the driver’s, those requiring physical help, or people who are blind and rely on service dogs (which have been known to shed).
Uber has not provided a reasonable explanation for its passenger-rating system. No need. This rating system is for sifting out the good passengers from the bad.
A guy named Aaron Landy created an easy-to-use hack that would allow passengers to see their Uber rating. Eventually, Uber got wind of the hack and shut it down. But not before a number of passengers reviewed their secret Uber rating.
I wonder if any of those passengers who used the hack were blind people who rely on service dogs? Probably not. Uber doesn’t reliably serve blind customers so there likely aren’t enough of them in Uber’s system to have heard about the hack in time.