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Every day I have to go back there is the worst day of my life...
You're obviously struggling to disconnect the tech from what it could be used for though. You're question was why this tech should exist. I gave you a very benign purpose that one could use it for as an example, thinking you could extrapolate on what other uses you might take for granted that not every person in the world is allowed. The medication example I used was meant to be the more compelling argument.
I agree with your point that the majority of U.S. users will not be engaging in "legitimate" business dealings, but I doubt there has been a government that has never banned a substance/item/idea because of pressure from special interest groups. A system like this could be used by people in [OppressiveCountryName] for something as honest as buying a book that has been banned.
It seems more and more like we're the real leaders in North America now.
The US is just making an effort to be leading from the rear. 'Merica!