Terrorism - "the use of violence and threats to intimidate or coerce, especially for political purposes. "
SOPA (in a nutshell) - allow holders of copyright to enact and enforce injunctions against ALL PARTIES involved in a alleged violation. ED: In old school terms, this would have consisted of: The Newspaper, Radio (and TV), Drivers of trucks who distribute the newspapers, Stores than sells the newspaper, Manufacturers of radios, Newspaper editors and publishers, Journalists, Disenchanted youth, and the bloody ROADS that the trucks drive on to distribute the newspapers.
Why?: Because incumbent and long established companies wish to stave off the tide of inevitable change.
Copyright - Created on or after January 1, 1978, life of the author plus 70 years. Except for Disney.
Why would we pass a law that allows record companies to engage in terrorism?