Hello highdose:
I understand your frustration with Witnesses who continue to call on your home when you have expressly told them not to. May I suggest that you now call the local congregations in your area and state your wishes? You may have to call several and leave a voice message, but at least you will be directly contacting those who can do something about this. Good times to call would be on Sundays, as well as Tuesday and Thursday nights, the normal meeting times when you know the Hall will be occupied. And as for how to react when Witnesses continue to call on you, I would say that the best way is to politely, kindly, but firmly let them know that you were once one of Jehovah's Witnesses but have left the organization with no desire to return. They will probably view you as an "apostate" and word will spread very quickly that your home is to be avoided at all costs!
As for a scripture that discusses the methodology of the first century Christians, Acts 5:42 says that after the apostles had been commanded by the Sanhedrin to stop their preaching, their reaction was: "And every day in the temple and from house to house they continued without letup teaching and declaring the good news about the Christ, Jesus." So the apostles and other Chrisitans engaged in the house-to-house ministry. It is difficult to imagine them doing so unless they had seen Jesus do this himself. And in fact, he gave them explicit orders to do so at Matthew 10:11-13, telling them to search out "deserving" people in any city they entered. They did so by contacting individual households.
The Gospel account says: " 'Into whatever city or village you enter, search out who in it is deserving, and stay there until you leave. When you are entering into the house, greet the household; and if the house is deserving, let the peach you wish it come upon it, but if it is not deserving, let the peace from you return upon you.' "
As I have posted above, I think it is very important that we do not let our own dislike of the organization cause us to act in a way that only makes us look bad. True, the calls Jehovah's Witnesses make on their neighbors are unwanted and unwelcomed by many. Nevertheless, we want to give them the benefit of the doubt and treat them with decency and respect. We also don't want to tar them all with the same brush, viewing them as stupid, ignorant, fanatic, apathetic, etc. They already do that to those of us who have left their organization, thinking of us as immoral, indecent, mentally diseased, and other derogatory terms. Let's not stoop to their level if we can help it.
Quendi