The worst (read best) rock 'n' roll animals never grow up. They act like idiots and we let them get away with it because they make great music. In rock 'n' roll it's always better to burn out than fade away into "maturity" -- i.e. making tame and crappy music. Guitar Wolf - (from left) Billy, Toru and Seiji - perform in July at Ebisu's Liquid Room. But some of these animals seem indestructible. Think Iggy Pop, Keith Richards and the rockers I'm meeting today, Japan's toughest and most hardcore hoodlum band -- Guitar Wolf. Tonight, the permanently sunglassed Seiji...