No way, Sinsull; it's the guy rattling the bones with abandon but no great skill in the back row who's got to go. Them and the misguided soprano who thinks she's in an opera. The tone-deaf people, at least those who KNOW they're tone-deaf, usually sing under their breath in my experience...

From what I've seen, it's not the folkies who need encouragement to sing along at a concert. It's the mainstream or radio-raised crowd who attend a folk concert only on occasion who need the encouragement. Not direction, just encouragement. I love the performers who make a point of commenting on how great it sounds from the stage, even if it didn't.

As Jon Campbell said once to an audience that was not helping on the chorus, "You need just the right amount of apathy for a sing-along. I think we almost got it that time."