Reasons to turn it off:
- When you bought the ticket you agreed to the airline's terms and conditions, which include obeying the cabin crew's instructions.
- It's courteous and polite to the cabin crew who are just doing their jobs.
- It's considerate towards your fellow passengers, who may be worried by your use of the device.
- While it *may* be safe to continue using the device, or just put it into sleep mode, you can't be sure of this. You may think you know, but you don't. This is a deeply technical area and layman's gut-feel doesn't work.
Reasons not to turn it off:
- A selfish desire to avoid a couple of minutes without reading.
Take your pick.
/JB