There's plenty of advice out there on "best practices" for running a business. But when a major scandal exposes remarkable malpractice, it can be an illuminating case study in "worst practices." Well, as news continues to break about a huge database hack that has exposed literally half of the United States and Canada to identity theft and worse, it offers an excellent object lesson in how not to handle crisis management, how not to handle personal information, and how not to use your subscriptio...