I just signed up for the national do-not-call list. I created a new e-mail address to process the registration, so an easy association isn’t available between my e-mail address and my phone number. Not that the feds couldn’t sopena such information, but bureacratic inneficiency is a friend of freedom, if you ask me, and so the more hurdles the better.
I did not, however, use an IP anonymizing service, or a public hot-spot, to submit my information. So now they can make an easy association between my static IP address and my phone numbers. If you are paranoid about such things as a matter of principal, don’t make the same mistake I did.