Activision Blizzard warns users of its Battle.net gaming portal that their personal data has been accessed by attackers. The company recommended that players in North America and beyond immediately change their passwords. Attackers obtained a list of all Battle.NET players, except for those in China. The most likely explanation for the breach is for harvesting email addresses for use in phishing attacks. Blizzard reported $4.8 billion in 2011 revenue from its massively multiplayer online game World of Warcraft, ak.a.”]