> it's going to be tht much more difficult for flight attendants to get everyone's attention to give instructions

I've taken the plane more than a hundred times, I know the instructions and I know no one has ever bothered me when I leave my ipod/phone/nintendo ds turned on. Sometimes the flight attendance asked me to turn it off so I comply, otherwise I don't. Also especially because I like to listen to music when I take off and feel like I'm in a movie.