this the type of stuff that grinds my gears.
i wouldn't be surprised if electronic device interference played a part in that san fran plane crash. people don't understand that, particularly when you're flying to an international destination, its critical that the flight deck is able to communicate with atc without interference especially since often times there is a language barrier that can hinder instructions.
turn off your damn electronics people! the flight attendants don't ask you to do it for the sh*ts and giggles.