[inigoesdr]

That's completely bogus. You only need to turn off the broadcasting it does, and even that was declared unnecessary by the FAA recently(iirc). You can record the takeoff and landing all you want, as long as you aren't affecting other passengers.

[semi-extrinsic]

Funny story: two years ago, back when anything electronic was banned during takeoff/landing, I was flying to Svalbard. If you don't know it, it's a very beautiful, very cold island north of Norway. During final approach, the sunset was so beautiful that the flight attendants went "ah, screw it" and turned on their phones to take pictures. Naturally everyone else did as well.