I like the bagpipes. And have noticed a similarity between bagpipes and open tuned guitar that we don't need to get into here--

At any rate, I am lost on your point Lowden--the custom of trade is simply that you are only entitled to a refund if the performer is does not appear. You are entitled to your opinions, of course, but they aren't worth anything at the box office. Back in Philly, someone who carries on as you have is escorted from the premises, often with a few "Tony Soprano" flourishes.