Something Splendid post says everything you need to know, so here's a quote and please head over to her site to read the rest:
"If you’re a blogger, there’s an important piece of legislation up on Capitol Hill that will effect you – and you don’t have to live in the United States. The House of Representatives’ Stop Online Piracy Act, or SOPA, and its partner in the Senate, the Protect IP Act or PIPA, are bills that overreach and limits the right of free speech by blocking any website that so much as links to any content or website deemed to be “infringing” – even if the owner was not the one to post it. The proposed DNS blocking system is the same as the system used by China, so that anyone with an IP based in the United States will not be able to access the websites on the “blocked list”. If your website is flagged, you will lose your entire readership base in the United States."
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