I am reminded of the Hobgoblin Brewery advertising slogan:

"What's the matter Lager boy, afraid you might taste something?"

If you bought a pint of beer and decided halfway down you didn't like the taste, would the barman give you your money back? I suspect not.

A concert is rather like a pint of beer - it can be the same beer (performers) but in different venues it will have a different flavour (content or character)... if you don't like the beer in one pub, either don't go back to that pub or try different beer.

They heard something they didn't like... perhaps they were afraid they might be made to think.

LTS