We seem to be digressing, but I disagree. On the flights ive been on you are instructed to turn off all electronics for take off and landing and to ensure that flight mode is enabled before you switch them off
Theres a few links backing me up
http://www.wisegeek.com/why-do-all-electronics-have-to-be-turned-off-for-takeoff-and-landing.htm
http://travel.usatoday.com/experts/cox/story/2011/01/Ask-the-Captain-Why-cant-I-use-my-cellphoneKindleiPad-in-flight/43067102/1
I agree!