As a Canadian and someone with 15 years of experience in the basic technology which makes up the Internet, I find SOPA extremely troubling.
Organizations, such as ICANN, http://www.icann.org , control some of the most basic functions of the Internet. Most of these are American organizations. They can, under this sort of legislation, be compelled to effect changes to basic services such as Domain Name Service and allocated Internet addresses
These changes can have direct effect on Internet users here in Canada and anywhere else throughout the world. Internet service, for any organization, anywhere in the world, can be disrupted by actions taken by ICANN.
It is about time for the Government of Canada to demand treaties with the United States which protect due process of law and Canadian sovereignty over the Canadian Internet and a Canadian's ability to communicate with any party in any country regardless of whether or not that party may have broken American law.