I really think a lot of people don't understand why the text messaing is a nuisance. When you tell them that the light from it is distracting and like a flashlight in the face of the person behind them, people always say "Well I dont mind when other people have their phones out." Its so frustrating.
I actually just had a falling out with a close friend over this. A few weeks ago we sat front and center at Phantom, and at the end of the intermission, he was doing something on his phone, and the usher came by and asked him to put it away. He said "I'm turnging it off now" And when she walked away, he said "If you weren't here I would have really said something nasty to her" He said since I was a "theater person" he would restrain himself from starting with the usher.
I asked him if he thought it would be better for the usher to wait til act II started and then come tell him to turn his phone off, and he said yes, because then it should be off, it could still be on at intermission. I reminded him that he's in the front row, so there are rows and rows of people who would have been distracted by his phone.
And then sure enough, a few minutes after Act II started, the usher came back and told someone in the 2nd row to put away a cellphone. I whispered to him "oh yeah that's MUCH better now when its disrupting the show for all of us" He got so mad at me he wouldn't even say goodbye, and I haven't spoken to him since then!