Actually there is a law. It is called listen to all crew member instructions. Right in the FARs. Also when you buy the ticket, there is a contract of carriage with it. Which says you must comply with all company policies and federal regulations set forth by the airline and the FAA.
OKay now this cool. Really nice website and when more cameras get added it will be an invaluable tool, especially in areas with frequent fog and unpredictable weather