Reporting on the hacker collective Anonymous is always fraught. This loosely organized group has no clear leader and no clear agenda. The anarchic nature of its technological attacks make it difficult to establish a who-what-where-when-why. And, of course, hackers use nom de guerres. Heck: Even the Islamic State has a spokesman.
Yet, in attacks on Israel, Visa and, to a lesser extent, Ferguson, Mo., showed that Anonymous

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