As to the influence of this legislation worldwide, while I'm sure that the US government, in its all consuming need to mind everyone else's affairs, will eventually try to force the rest of the world to pass similar legislation, if, of course, these bills pass, the international conflict is more immediate. SOPA and PIPA will have full effect on American companies, and a significant effect on foreign companies that operate in America. This means that, on the most noticeable level, sites like YouTube, Facebook, and Reddit, who operate in American territory and under American law could be forced to shut down large pieces of their sites, if not the site entirely, for the trespassings of a single user. This effect would be international, and, given the number of businesses that rely so heavily on large media sites, could have a profound effect on the global economy, an effect that I am beginning to doubt the members of Congress pressing for these bills (many of whom admitted in recorded debates to not knowing much about how the internet, or even computers function) have even bothered to imagine. What is more, it has already been demonstrated (by Universal, I believe, though I may be wrong; when they managed to place a DNS block on MegaUpload, a
German site, for all locations in America, its territories, and Iraq) that the power given to corporations by these bills will allow them to do to America, exactly what Americans have been criticising the Chinese
government for doing; namely, censoring the internet to the point where all available material is regulated.
In any case I can only see this legislation as doing significant harm to the world at large, economically, technologically, and, yes, even culturally. I can't imagine that anyone in support of this has evaluated the far reaching consequences, and I know that should it be enacted, this would only cause to create huge inconvenience, loss of freedom (something most Americans are rather opinionated about), and social unrest, while any pirate worth his salt will be able to continue on doing what he'd been doing.
*Sorry for the huge sentences, it's a habit.

**Also, why does this site think that refreshing Preview is spamming?