In 2008, a Walmart worker was trampled to death in New York as 2,000 shoppers stormed the store at 5 a.m. Later that day, in Palm Desert, Calif., two were shot to death at fight at Toys 'r Us.
In 2010, a woman was arrested in Wisconsin who had cut in line, warning those unhappy with her that they would be shot. Last year, a beef over a Florida WalMart parking spot led to two people being shot.
Fistfights, gunfire and robberies have become a Black Friday cultural norm.
Last year, the Occupational Health and Safety Administration issued guidelines to retail outlets on how prepare for throngs of shoppers antsy after waiting in long lines to snag a few loss-leader goodies.
Among the OSHA recommendations:
--On-site trained security personnel or police officers.
--Barricades or rope lines for pedestrians that do not start right in front of the store's entrance.
--Implementing crowd control measures well in advance of customers arriving at the store.
--Emergency procedures in place to address potential dangers.
--Explaining approach and entrance procedures to the arriving public.
--Not allowing additional customers to enter the store when it reaches its maximum occupancy level.