[DawnFalcon]

I will certainly put my ereader away during takeoff/landing, but actually switching it off? Completely unnecessary, it can happily sit in my bag on it's page until the plane's achieved cruising altitude.

jbjb - Certainly. This is why devices have radiation emission certifications. Of course we can know, by looking at them, the maximum emission levels.

Hellmark - Oh good joke about military devices. Ha.