More trouble for Uber as at least four drivers recently ticketed by Los Angeles International Airport Police have criminal convictions that would prevent them from operating a taxi in Los Angeles, according to the Los Angeles Times. While Uber officials say they perform background checks, the convictions raise questions about how well drivers are screened. Six Los Angeles City Council members also said last week they want to reexamine a new airport permit process that would allow Uber and other ridesharing companies to legally pick up passengers at LAX.