It's a familiar story. After Thanksgiving, hordes of holiday shoppers race to big box stores, shoving each other out of the way to get the best deals. Retailers jockey to be the first to open their doors, trying to undercut each other with even-more-lowball promotions, desperate to squeeze every penny out of a two-month period that historically accounts for some 40 percent of their annual sales. Each year, it seems like the competition couldn’t possibly get more shameless. Each year, it does.