I for one have not seen anyone at a session with a miked up box?? If someone is by consensus of the majority 'ruining a session' why not just talk to them? I for one, when starting a set of tunes, will just shout stop if someone is running away with the speed that i have set and then start again.

I tend to agree that people playing Castagnari wardrobes in the English up and down the row style are playing the wrong instrument as it's not what they are designed for.