Taxi passengers are required to check for traffic before opening their doors.

I saw a biker get doored Friday afternoon in San Francisco. The driver stopped and the cyclist asked the SUV passenger (who doored him) "Are you guys okay?" There were police all over the place (this was near Union Square with heavy traffic and many protesters), one who witnessed the incident, two who came to see if the biker was okay and one who took a statement from the SUV occupants.