It’s not the average that matters - it’s the number of 1-stars or rides where the passenger felt the driver was highly unacceptable. A driver might be perfectly safe and polite to a majority of customers, but a danger to vulnerable people or different groups of people. It would be good, for example, the app to overweight low ratings from young women - with almost no tolerance for 1-star ratings from that group.

It would also be good if the ride share companies share details of the most scary drivers who have been ousted, so that they don’t get two or three shots.