Operation Payback was an effort to back WikiLeaks. But was it effective? Anonymous isn't dedicated to knocking power grids offline, or crippling hardened military communications networks. Rather, it's online activism in the form of a PR campaign. Notably, the group launched DDoS attacks against the websites of MasterCard and Visa, highlighting their refusal to accept donations bound for WikiLeaks. But rather than disrupting those companies' payment networks, which would have hit their bottom lines, WikiLeaks' supporters merely knocked the companies' public-facing websites offline.