From the Guardian, Saturday 26 January 2013 11.48 EST:
By late Saturday morning, the USSC website was offline, but cached versions could be found where the message appeared.
Anonymous, which has been the target of numerous arrests and FBI probes, has taken a relatively high profile in several cases recently. In the small Ohio town of Steubenville, which has been rocked by rape allegations against several high school football players, the group has organised protests and posted evidence it says shows evidence of a cover-up of the alleged crimes.
Anonymous is a loosely defined collective of so-called hacktivists who oppose attempts to limit internet freedoms. It has suffered from some high-profile arrests after attempts in recent years to attack major corporate government websites.
Swartz and Anonymous have been firm advocates of open access to information and open-source programming. At a memorial service for Swartz last weekend, several of his supporters called for those who were attempting to prosecute him to be held accountable for their actions.
Swartz had faced a possible jail sentence of 30 years, though it has since emerged he was also offered a plea deal of six months. Officials involved in prosecuting the case have insisted they did not over-reach in their aggressive pursuit of Swartz but have faced a storm of criticism for their behaviour.