Electronic devices on planes are dangerous...

... but not for the reason the FAA seems to want you to believe.

If progress [toward changing the rules] is slow, there will eventually be an episode on a plane in which someone is seriously harmed as a result of a device being on during takeoff. But it won’t be because the device is interfering with the plane’s systems. Instead, it will be because one passenger harms another, believing they are protecting the plane from a Kindle, which produces fewer electromagnetic emissions than a calculator.