Once again Uber finds itself taking heat for questionable business practices. This time the company was using software to identify iPhones even after their owners deleted the Uber app, or even wiped the phones altogether. That technique, known as fingerprinting, isn\u2019t uncommon\u2014and shouldn\u2019t be interpreted as tracking your every move. But Uber\u2019s implementation crossed a line with Apple, in particular because it tried to hide what it was doing.