[Jinglish]

I haven't noticed too many cell phone uses problems during shows at my high school, although that's partly because I don't have a great view of the audience. We have a couple of student makeup artists who don't seem to care that their phones can interfere with our mics, though.

Camera flashes are really more of a problem for us, and those almost never happen except at the mid-high plays. I ran followspot for a couple of ballet shows at the local community college's theater, though, and I must say that some ballet parents have a bad habit of disregarding about half a dozen "no flash" warnings. They don't seem to get that there's enough light on stage and that flash kills the colors.