Here's an interesting little tidbit from the Economist about Uber...drivers rate their passengers.
At the completion of a trip, a passenger is asked to rate the driver; the driver, in turn, rates the passenger. Drivers who have poor ratings do not last long, Mr Kalanick says, while poorly-behaved passengers may have trouble securing a ride, since a driver can decline a fare if the hailer has a bad reputation.
I'd expect more of this credit scoring in the future...you might have trouble getting a reservation, a hotel room, or seat on a plane if you're an asshole.