April 27, 2000: Cheng Tsz-chung, 22, was put behind bars last night after changing the password on another user's account and then demanding $500 (Hong Kong currency) to change it back. The victim paid the money and then contacted police. Cheng has pleaded guilty to one charge of unauthorized access of a computer and two counts of theft. The magistrate remanded Cheng in custody and said his sentence, which will be handed down on May 10 pending reports, must have a deterrent effect. Cheng's lawyer told Magistrate Ian Candy that his client committed the offenses "just for fun.