My guess is that if you put your phone away you're less likely to hurt from, you know, other people doing the stupid stuff they do at concerts.
I understand that people want video, so they can post it, and get their dopa-soc on Facebook, or wherever, but seriously, musical artists (especially the ones who don't lipsync their concerts) feed off the audience's vibe. Its a two-way, not a one-way. Jack White isn't feeling the energy and is doing something about it.
I say, Jack should just take out his phone and sit there recording the audience, until the get the hint.