Thanks to the USA/Patriot Act, it looks like "Know Your Customer" doesn't apply only to banks any more. All US Companies must report any cash transactions over $10,000 to the IRS. Much like the rest of the legislation, this will do nothing to prevent terrorism, but increase government control over all our lives.
In separate news, the US has successfully pressured companies to cut all internet and most long-distance access to the nation of Somalia. This country has lacked a government (aside from a mostly unrecognized puppet government appointed by a neighboring country) and by all accounts is thriving despite (or because of?) the ongoing anarchy.