You obviously know nothing about anarchism in the philosophical sense.  This DDoS attack is anarchy only in common use of that word, and it's far, far from the philosophical meaning of anarchism.  Anarchism in the political-philosophy sense has nothing to do with such a childish and idiotic thing.  Anarchist are in favor of organization and order, but happen to believe that it ought to come from the bottom up.  Anarchist are not in favor of harming others or causing the kind of disruption this DDoS represents.