"If they ask "silly money", or if they are unpleasantly arrogant, they won't get the gigs - the market will soon sort it out."

Yup. I'm sure we can all think of examples of "the next big thing" who crashed and burned because they started to believe their own press and forgot how to be civil to people. Then again, sometimes people get a reputation they don't deserve through rumour-mongering and sad old gossips whose time is past, and whose only joy comes from bitching about other people because it make them feel "in the know". I remember being concerned about hving booked Seth Lakeman because of all the negative stories that surrounded the Equation. When he arrived, he and his band were unfailingly polite to every single member of staff in my venue.

You have to draw your own conclusions: one person may claim that a youngster was arrogant and abusive. Another interpretation of the incident might be that the complainant was bitter old folkie with a chip on his shoulder and an axe to grind, and goodness knows what they might have said to the young person in question to elicit such an extreme response. In any case, we should remember that every one of us is entitled to bad days.