I think we all can live with the odd oversight.

I was thinking more of those strange people who choose three long songs for a spot- American Pie, House of the Rising Sun and The Band Played Waltzing Matilda. I remember one bloke did an exptemporised song that went on for nearly twenty five minutes, and God alone knows what it was about, but he threw a tantrum because the MC said - sorry mate you can't do another.