Reply #2: Anonymous' previous beef with Sony...

[ChromeFoundry]

It's all in response to Sony suing two owners of PlayStation 3s who developed and released code that allows third-party software as wells as the Linux operating system to run on the platform. Sony says it violates licensing agreements that come along with buying a PS3.

Anonymous regards it as censorship about how Sony products work. "Your corrupt business practices are indicative of a corporate philosophy that would deny consumers the right to use products they have paid for, and rightfully own, in the manner of their choosing," according to a posting on the anonnews.org Web site announcing its OpSony, part of its ongoing Operation Payback that has targeted many different entities.

http://www.networkworld.com/news/2011/040611-sony-anonymous.html "> More...

Of course this does not mean that they played a part in the current data theft attack. More probable, the criminals involved left the message to distract from their objective.