What does SOPA mean for us foreigners?

The Stop Online Piracy Act is an American piece of legislation, and as a general rule, American legislation has only limited influence outside US borders.

My fellow Europeans might, for example, marvel at the almost proud dysfunction that led to the creation of some American legislation, but ultimately it was irrelevant to us; a sideshow to be watched with bemusement. SOPA is a little different from most legislation, however, in that it has an explicit focus on websites that are, in some sense, "foreign." SOPA regulates the dealings between American service providers—most notably search engines, advertising networks, and payment processors (such as PayPal, Visa, and MasterCard)—and foreign sites. Search engines will have to remove listings of offending foreign sites; advertising networks will have to stop selling ads to offending sites; payment processors will have to stop processing payments from Americans for offending sites.

The delineation between foreign and domestic that SOPA makes is arbitrary and inaccurate. Canadians, whose IP address allocations are governed by the US-based ARIN, probably qualify as "domestic," and so may evade SOPA's regulations. So too might the Hong Kong-based MegaUpload, thanks to its dot-com domain name, and similarly the Switzerland-based RapidShare. The Pirate Bay might also escape SOPA's reach, thanks to a dot-org domain name. There's plenty of scope for interference with these sites' operations, through measures such as ICE takedowns. Just not necessarily using SOPA as the justification.