PThespian said: "It is also frequently impossible to pinpoint who the offender is.
When I was working in the mezzanine at Miss Saigon last week someone's phone went off four times in a row.
I could hear it was coming from the Rear Mezzanine, but I didn't see any light from it. "
I was at Mormon when a flash flood alert came on and the handful of people who still had their phones on, of course, received the message. I heard an usher pacing around behind me going, "Who has their phone on?!" but I guess no one took out their phone soon enough for him to see who it was. And at that point, there were probably way too many people to track down. At least it wasn't during a particularly quiet scene.
If there's an intermission, I do my best to find an usher to point out offenders, and it usually works. In particular, it worked with a drunk family (an entire FAMILY) in the front row at Jersey Boys a few years ago. They enjoyed multiple sippy cups of wine and I could tell halfway through Act 1, Act 2 would not be good if I didn't alert an usher to what was going on. They ended up saluting Nick Massi during the sit-down (?!), but did get talked to at some other point, so I guess it wasn't as bad as it could've been.
"This thread reads like a series of White House memos." — Mister Matt