Blondie,
The right to do door-to-door evangelizing has already been confirmed in the US Supreme Court and very recently too. As long as it is in the US,I doubt that the government will start telling religious groups what they can do unless it is a crime on the books.
Makeing the d to d work illegal on the basis of harassment is not interfereing with a persons right to practice his religion, it is just recognizing the right of people not to be harassed in thier own home by someone trying to convert them on something as personal religious beliefs.
What about the work of LDS/Mormons going from d2d; or the Baptists down the road who do go d2d as well?
They too should be fined if they go door to door, harassing people with their religious views. They should find another way to advertise their religion, that doesn't disturb people's privacy. Why should a person have to put up with someone comming to their house on a regular basis, trying to in effect shove thier religion down thier throat by uninvited repeated calls. I think such a law would not really be out of the question.