If they continue to knock on doors..I wonder if taking any literature they offer and NOT contributing would discourage them from coming back. Maybe take the literature each time they come and say thank you and close the door..I bet after a while they would stop coming..hurt them in the pocketbook..
Course on the other hand I knew some that did this just so they could say they placed magazines..even if it cost them or they placed older magazines. The society comes out ahead no matter..as long as someone pays for the literature they are happy.
Snoozy..who knows that no law will stop them from coming to your door..