I guess I only disagree with you on the part where you say they are "duping" the public.   The fact is that when they play those towns, the people who come out are looking for exactly what they find. While I don't consider myself part of the audience that you describe, I do think that audience needs to be served. That audience will get their moneys worth and that is the way it should be. For a brief moment the music brings them back to a different time and place. That is a function of music that should not be forgotten. A good song and a good performance is an artform as well. It may not be our cup of tea, but someone else likes it. Far be it from you and I to make the decision for them.