In a free society, speech at times can be annoying, obnoxious, unsettling or offensive. Panhandlers and political protesters can approach you on the street. Controversial ideas can be expressed on tee shirts, bumper stickers or license plates. And governments cannot block speech merely because it is irritating or bothersome — unless you are talking about commercial speech, in which case government bureaucrats have been given more deference to restrict speech. For example, the New York City Taxi and Limousine Commission determined that Uber and Lyft drivers could not install tablets that would display advertisements or allow passengers to play games...