I wonder how Megan McArdle feels now that she knows Uber will turn her data over to the state if it is requested. Uber released a transparency report and says it released data on 12 million riders to law enforcement and regulators. They gave data about "trips, trip requests, pickup and dropoff areas, fares, vehicles, and drivers." Of course McArdle has nothing to worry about but she's more than a little paranoid about the government's tentacles wrapping themselves around her and smothering her with its road repairs, airplane inspections, and clean water.
Since nobody can do anything ever, there's nothing McArdle can do about it. If Uber were to change its policies, drivers would lose their jobs and she doesn't want that. And she has nothing to worry about because she doesn't do anything wrong. She's not using stolen credit cards or committing fraud and nobody will subpoena her information, one presumes. She's not one of those libertarian hipsters that buy herbs that are not yet legal in DC. Nobody cares how many times she visits bars or where those bars are.
Since corporations are people, we would never want to stifle their free speech by forbidding them from releasing data.