I air conduct a lot. There is another regular at the barbican, a few times we have ended up next to each other, when he sees me next to him he groans. And puts his hand next to his eye to block the side view. Otherwise he is quite friendly. I have also got taps on my back between movements asking me to stop. I don't. These classical concert attendees are snobs who don't know how to enjoy music. Someone should send them to rock concerts for a primer before they start attending classical ones. It's all about air gestures and head banging