COTABATO CITY - Agents of the Department of Trade and Industry on Tuesday destroyed more than P30,000 worth of substandard crash helmets and other merchandise seized from different stores.Mary Anne Morales, a senior staff of DTI’s Region 12 office here, said the goods were confiscated and disposed off as part of the department’s consumer welfare and protection thrusts.Morales, one of the DTI-12 employees involved in the seizure operation, said the substandard products --- crash helmets, electrical switches, receptacles, multiple male and female plugs, and circuit tapping devices --- were fi