Richard H. Lenny, the chairman, president and CEO of Hershey Foods Corp. stood firm at yesterday's [Tuesday's] annual general meeting despite challenges from striking confectionery workers. Shareholders and management had expected some barracking from disgruntled staff, 2,800 of whom are striking over contract terms. The dispute focuses largely on worker health insurance contributions, which the company says must be increased from the current 6% to 10%, then 12% in the fourth year of the contract.