Could these be sales people giving a per driver incentive? Or was it from the direction of a manager? If it was sales people, fire all of them. If it was a manager, fire him or her. Then issue a press release.
"Uber Driver Allegedly Locks Passenger In Car, Gives Himself Five-Star Rating"
http://laist.com/2014/01/21/uber_driver_locks_passenger_in_c...