A few months ago, we got to see one of my favourite performers, David Byrne, live in concert, in Toronto. Just before he took the stage with his band (and co-headliner Annie Clark, a.k.a. St. Vincent), he spoke over the P.A. with some witty advice. Fans were welcome to take pictures and all that, he said, although he kindly reminded people to be civil and not keep a screen in someone else's face.
He got a good laugh, and for good reason: there's been an annoying tendency of some fans to not just snap a pic, but to in effect make a movie, regardless of a) the quality of the product and b) what the production means to the folks in the surrounding seats.
I spotted the above cartoon on Tumblr, via here.