At the very least it will tie up the system
Or it might actually show these guys what kind of monster they have brought about ... kind of like Sarcozy's household being disconnected from the internet
http://torrentfreak.com/french-presidents-residence-busted-f...
http://www.futureofcopyright.com/home/blog-post/2011/10/04/g...
But it's OK when THEY do it, right?
However, if there are only foreign sites (registrar is abroad), then I doubt any major sites are hosted there, besides
http://bit.ly http://t.co http://youtu.be http://goo.gl
Correct me if I'm wrong, but under the current SOPA, only FOREIGN SITES can have their financials cut off, right? I thought the Operation In Our Sites is able to already seize domain names registered locally. So it seems to me that the SOPA simply adds provisions to censor sites registered abroad, in American DNS only, because their registrar is beyond US jurisdiction.
For example Russians use vkontakte.ru to listen to any song. What would SOPA do about this?
However, YouTube contains lots of uploaded songs and the US government could have seized their domain for a long time already, but didn't.
So I think the threat is more to the purity and security of the worldwide DNS system, as well as to the costs of the ISPs, than it is to social networking sites. At least, I hope. Does SOPA override the DMCA for locally-registered sites, or did Operation In Our Sites just give carte blanche to the government to take out sites?