An activist hacker group called Anonymous is taking responsibility for an orchestrated cyberattack against Mastercard and says that it’s planning other attacks in order to “wreak revenge on any organization that lined up against WikiLeaks,” according to the NY Times.

The story says that Anonymous doesn’t have a leader, and one of the activists stated in a telephone interview that 1,500 hackers were lined up to attack various companies and individuals. On the list of those that have been hit are Amazon.com, PayPal, and PostFinance, the financial side of the Swiss postal system.

This situation poses a big strategic question for PR pros working with companies that have come in contact with controversy.

(Updates after the jump.)

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