More than 5,500 shoppers — half of them Sweetbay Supermarket customers in Florida — peppered the Hannaford Brothers toll-free hotline (1-866-591-4580) Tuesday after news hit that 4.2-million credit and debit card numbers were exposed to hackers between Dec. 7 and March 10. Some ranted. Others complained the company waited too long to tell them. Others were relieved identify theft was a doubtful outcome since the chain does not keep personal information such as names, addresses or Social Security numbers. Unlike the 2005 TJX Cos. hack that exposed 46-million card numbers to thieves who used some of them to create counterfeit gift cards, Hannaford was certified as meeting the so-called Payment Card Industry Standard last spring. So the Hannaford/Sweetbay hack is the first publicly disclosed breach of a retailer system that met the industry's self-imposed security standards for transmitting card data.