The idea
Do not allow companies to telephone a person's house to try and make enquires about their needs. Or to try and sell them their services.
Why is it important?
It is a total invasion of privacy
If I need information I shall go and seek it myself.
I answer my telephone when it rings…and sometimes it may be while busy doing something important. To interrupt my activities, in order to barge into my personal space is not only a nuisance, it is also intrusive.
A telephone line is a link into my privacy, and I should be the one in charge of who Is allowed to use the facility.