Agree, Jacqui. I wouldn't pay money to see someone who is likely to be drunk or abusive on stage. But what if that person has been reported as being abusive off-stage (Noel Gallagher for example)? What is "fair game then"? Would you go to see him (assuming you are a fan of his music)? And more important, would you try to persuade others not to go and see him?

As freda says, it is a very fine line, and most of us overstep it from time to time in the heat of the moment. I just wish we could define that line.

GUEST, no, you did not specify "during a performance", but you said "audience", which implies it. That is why I made the distinction.