When Les Ivall was still the landlord of the John O'Gaunt in Sutton, he didn't like anyone using a mobile phone in his pub. There were several phones nailed to the wooden beam over the bar as a warning to others.

Will Fly - well done! Nobody deserves to take the piss like that and get away with it, and as then, a quiet polite word is often all that's needed. Some people really don't know how to behave and need to be told.

I don't mind people using a smartphone to record tunes, though in some cases where regular sessions are involved it would be nice if they came back to later sessions showing some sign of having learned any of them.