Shimrod, Thats exactly what you are, trying to tell others, with if I might say so, a slight air if disdain, that the use of Crib sheets would not be acceptable to any serious performer.
Musket, I think you maybe confusing crib sheets with bad manners. Of course the rustling papers, and come to that, any other form of disrespectful behaviour is unacceptable. That's not the fault of the crib sheet, that's the fault of the individual concerned and their lack of consideration for others. I would accept this situation has worsened over the last few years, but that merely reflects the way society has become more intolerent.
Folk has got to accept that if promote sessions and singarounds, quite often advertised as "come along sing and song or a tune play", then you will have to accept the rough with the smooth, whatever that may mean.