Yea, that sounds like a huge bother.
Still, I just hate people standing around watching concerts on their teeny tine smartphone screens. Seems like people just can't enjoy being in the moment anymore. Everybody has to share the videos, send snapchats to friends "OMG, I'M AT MUOOOSE" or putting clips up on Instagram so that people can see how much of an outgoing person you are...
Nah, I've experienced people who hold up their phones in the air, blocking my view... Why pay the equivalent of £90 to watch a concert and sit and watch it through that tiny screen half of the time?