I guess I'll join in on this clusterbacle.
Some people have said why not remove yourself and walk into the lobby to text-message. Well, I'm sorry, but someone shuffling through a row of people and then up or down an aisle is going to be a bit more distracting than a momentary and hidden source of non-focused backlight.
Some of you feel the need to flame (for all intents, yes it's flaming) the OP and call him self-centered or inconsiderate for thinking the world revolves around him. You may want to rethink that position, as the same can be easily said for you. YES you paid to see the movie, but so did he. And I'm sure you've never been a source of distraction at a movie, ever. Give me a break. You're in public, do not forget that, there will always be distractions. Just because you put down your $7 and step into a theater doesn't mean society automatically bends around your intollerance. If you cannot keep your blood pressure down, stay at home, I'm sure you have the money to afford decent equipment. If it's the public union you like, or the atmosphere of enjoying a movie with other patrons, then you have no reason to complain. You paid for exactly what you're getting. There will always be teenagers, there will always be crying babies, there will always be loud black women.
I understand that theaters have stadium seating, and you can plainly see the people in front of you, and I understand that your eyes are instinctively drawn to some new source of faint light. Whether you keep your attention on their phone or on the HUGE MOVIE SCREEN in front of you, is up to you. You DO have a choice, but some people love to be unhappy.
When I enter a theater, I put my phone on vibrate. If it vibrates during the movie (trust me, only I can hear it, it's barely audible when cushioned by my leg), I squeeze the button to stop it. When the movie is over, I check the phone. I wish all people would do this, but I understand what it means to be in public. I have tollerance. The light from an LCD backlight is the LEAST of any distraction I've ever noticed in a theater. I'd hate to think what going to a theater with some of you is like. Ha, the light I can handle! Miserable movie-going grumps like some of you, that's another distraction all together. (Though I do love you all, and I do not judge who you are based solely on your actions in a movie theater *COUGH*).