It's something of a forlorn hope on the part of Promowest that they can turn back the tide of technology.
People going to see Them Crooked Vultures (John Paul Jones, Dave Grohl, Josh Homme and a desperate hope that people don't see the words 'supergroup' as a dire warning) are being told to leave their cameras at home:
NO CAMERA’S ALLOWED DURING THIS PERFORMANCE, INCLUDING CELL PHONES. IF YOU ARE CAUGHT TAKING PICTURES YOU WILL BE ASKED TO DELETE THEM. IF YOU ARE CAUGHT A SECOND TIME, YOU WILL BE ASKED TO DELETE THEM AND ESCORTED OUT OF THE BUILDING. THANK YOU FOR YOUR COOPERATION.
Back in the 1980s, sure, you could spot someone with a camera and bully them. But when everyone at the gig will have a phone with a camera built in, how is this even going to work?