Yeah, I think a similar video played before the start of the show, about how you paid all this money to be here, why see it through a small screen as if you were on YouTube, combined with a few people actually getting kicked out, would work wonders.
They can have a moment in the show for everyone who "needs" a picture or a brief video can take one. And just let everyone know that the whole show will be on YouTube in good quality later-- no need to take your own.
This is a reaction I've heard from self-important attendees who insist on recording despite posted rules: "I paid good money to be here, so I get to do what I want."
"Why bother going to the live show when I can sit at home watching a Youtube video instead?" is something I don't think many people think. The video doesn't replace the experience.
It does increase costs, and not everyone will want to do it or have the means. But it doesn't have to be a full on video production. It can just be a phone mounted near the soundboard, plugged into the soundboard, so you can actually get great sound. I love listening to "live" music on YouTube, but it's not a replacement for actually attending a show.
Well, I think YouTube for stage acts is just like Streaming is to musicians. Most of them make the majority of their income by live performances, but the streaming is where its at otherwise.
They can have a moment in the show for everyone who "needs" a picture or a brief video can take one. And just let everyone know that the whole show will be on YouTube in good quality later-- no need to take your own.