LOS ANGELES (Reuters) - As bad boy lead singer of the anarchic, trail-blazing and short-lived 1970s punk band the Sex Pistols, John Lydon (then Johnny Rotten) snarled and spat his way across a shocked society and music scene still pleasantly half-high from the mellow 1960s. Never one to let the grass grow under his feet, Lydon left the Pistols in 1978 to form the more experimental - if less commercially successful - Public Image Ltd., and for the next 15 years the band's shifting lineup released a dozen albums and toured the world. ...