Shanghai taxi driver license

life - Taxi companies blacklist their customers

Shanghaiist points at this beautiful little initiative of Shanghai taxi companies. They have already a ranking system for their drivers and a creative Chinese mind decided to turn that around.
So, when it is very busy and you have to wait longer than ten minutes for a taxi, you might have entered their computer system as a 'difficult customer'.

“When we have many orders coming in, we will show the drivers the callers’ credit history and they can choose to pick up the one with a good record,” [a representative of the taxi's] said.

He said the customer ratings are based on several criteria, but he wouldn’t say exactly how they are determined. The whole system is computerized, and ratings are linked to the phone number used to book a cab.

Since there does not seem to be an appeal system, you might have to switch your SIM card to get a taxi after you turned nasty to your driver.