Mike Isaac’s Super Pumped (p. 216) reports that in Brazil, Uber had a particularly light sign-up process: No identify documents, no credit card (since cash was more widely used), and just an email address or phone number. Thieves and taxi cartels could therefore sign up for Uber anonymously — then steal or burn cars, attack or rob drivers, and sometimes commit murder. Among the victims was Luis Filho, who was stabbed to death as passengers stole his vehicle.