Well, i seem to have raised a few hackles by my comments but i will stand by what i said.
The reason being that if someone is expecting to earn living as a professional musician they they need to respect the audience who has paid to listen to them. Richard, If people like me didn't pay to see these performers they wouldn't be able to earn a living at all. Why do they do it if not to entertain and why should i be happy to accept less than their best because they'd been up carousing the previous night. Would you accept it from any other type of performer eg an actor or are folkies supposed not to bother?
It also doesn't matter if the person performance was up to scratch or not, it was the attitude that was unprofession not necessarily the actual performance. I have absolutely no problem with performers letting of steam etc off stage but informing your audience that it may cause a problem I think is unacceptable. I didn't approve of comments like that in the past and still don't.