What about for those of us that don't like the US and definitely don't want to work there?
After all how are you to know whether a site is mearly slashdotted or being blocked?
From the FAQ:
The request is diverted to the filter server which sees that the URL is banned and an “Access is refused” page is returned. The internet address of the requesting computer is logged.
6.023 x 10 to the 23rd power alligator pears = Avocado's number