Drat, they lost the ability to tolerate.
Personally, I hate it when phones go off in movies, but other than that I don't really care.
And if it's in the movie, I tell the people to shut the **** up.
Case closed afterwards.
My philosophy is don't let it bother you, and it won't.
(If you're having a hard time doing this, go into your car, stick your keys into the ignition, leave the door open so the car beeps, and listen to your radio. Eventually you won't mind the beeping.)