I couldn't agree more, I could understand if he/she was a heart surgeon on call or something, but when it's just a kid, what's the point? If it's important they'll leave a message. I have had a bloke hold a conversation on his phone once, sounded like an IT support call. He got some quite serious verbal abuse from the other members of the audience because of that. How does that guy live with himself being such a wanker?