This. I put it on airplane mode, stick it in my pocket, wait a few minutes. Sure, I should "follow the rules" and turn it off, but I'm impatient and I want my music. That's why there's an airplane mode.
I do the same with my iPod.
A friend of mine and I were flying once and he was changing his songs as we were about to takeoff. Some flaming ghey flight attendant came by and asked him to turn it off. He was like 'o yea sure', held down the power button and then just turned it over knowing it wouldn't turn off until he slid his finger or whatever.
The flight attendant goes 'um sir do you need me to show you how to turn off your device?' I've never laughed so hard in my life, punked by the flaming flight attendant nazi.