How do you feel about cellphones at performances?
You could call it the iPhone Alarm Heard 'Round the World, or the Marimba that Stopped Mahler. Earlier this week, a New York Philharmonic patron's persistent iPhone alarm, set to the chipper marimba tone, caused conductor Alan Gilbert to do the unthinkable -- stop a performance of Mahler's Ninth -- and insist the tone be silenced. Some in the audience called for more, shall we say, Draconian measures. How do you feel…