I was looking at Noxons reply on the Distant Memories thread, and thought of something...
How would bands react to people recording at their shows?
The bands want to make eye contact with the audience, and you can't get that when people record.
I would think some bands will definitely say something about it, even mentioning it before the show starts, or halfway through the set. Something like "We've been gone, and want to your beautiful faces, after so long. You've been watching us through the screens. It's time to watch through no veil."