When they stood up and booed Harrison Birtwistle’s “Gawain” at the Royal Opera House, they were branded “musical terrorists,” protesting Birtwistle’s gnarly music. Subsequently they were known as “The Hecklers”, fighting against modern music by disrupting high-profile performances. But “when a national newspaper labelled Keith Burstein, one of the co-founders of the group, a heckler, he angrily claimed it was ‘an outright lie’. He successfully sued for libel and was awarded £8,000.” – The Scotsman