I did not realize that SOPA had an anti-circumvention provision.

Here, I analyze just one of the problematic provisions of SOPA: a new "anticircumvention" provision (different from the still-problematic anti-circumvention of section1201). SOPA's anticircumvention authorizes injunctions against the provision of tools to bypass the court-ordered blocking of domains. Although it is apparently aimed at MAFIAAfire, the Firefox add-on that offered redirection for seized domains in the wake of ICE seizures,[1] the provision as drafted sweeps much more broadly. Ordinary security and connectivity tools could fall within its scope. If enacted, it would weaken Internet security and reduce the robustness and resilience of Internet connections.

It will be illegal to build tools that allow people to evade the U.S. Government's internet censorship infrastructure.