No fooling; on April 1, Internet marketing giant Epsilon announced that its confidential data had been breached. Epsilon sends about 100 million emails every day on behalf of customers like JP Morgan, Target, and Best Buy. The compromised data appears to be limited to names and email addresses of people who do business with Epsilon’s customers. If you have given your email address to any of the following, you may be affected: AbeBooks, Ameriprise Financial, Barclays Bank of Delaware, Best Buy, Brookstone, Capital One, Citi, The College Board, Disney Destinations, Hilton Hotels, Home Shopping Network, JPMorgan Chase, Kroger, LL Bean, Marriott Rewards, McKinsey & Company, New York & Company, Ritz-Carlton Rewards, Target, TiVo, US Bank, Verizon, or Walgreens.