I think politicians are exempt from the Do Not Call rules, as well as certain other groups...maybe charitable organizations and companies/organizations you've contacted or done business with?

I tell them ALL, "Send it to me in the mail. We don't do business over the phone." I can pick my mail up whenever I want to, and read it when and IF I want to. And my mail has NEVER interupted my sleep!!

When Bob's having a bad breathing day, I leave the (dial-up) internet connected so he doesn't have to deal with getting to the phone just to find a recording that he doesn't understand, or have someone badgering him.