The Amsterdam underwold took matters into own hand to stop the big gang of Amsterdam’s longhaired teen-age punks, the nozems.

Like big city cops all the way from Manhattan to Tokyo, police in once placid Amsterdam were being run ragged by teen-age punks. Dressed in juvenile delinquency’s international uniform—leather jacket and blue jeans—Amsterdam’s longhaired nozem* liked to roar around the city’s central Dam Square on souped-up motorcycles, scaring…