Many years ago now i remember hearing Harold King sing the song he had composed whilst incarcerated for his beliefs in China; it was called "House to House".
Nowadays it doesn't seem as though it's in favor. Notice its own description of its ministry which the WTS has placed on its website:
Jehovah's Witnesses are probably best known for their person-to-person ministry. Each congregation tries to reach all the people in its neighborhood with a brief Bible message at least once a year. This is usually done by Witnesses visiting from door to door. Witnesses will also talk to people on the streets, in parks and in other public places—wherever someone can be found who has a spiritual interest and a few minutes to talk. This approach is the same as that used by Jesus Christ and his apostles. The apostle Paul, for example, said, "I did not hold back . . . from teaching you publicly and from house to house."—Acts 20:20.
http://www.jw-media.org/people/ministry.htm
Is it possible that the lack of enthusiasm for the house to house service has forced the GB to do a re-think?