There are good reasons to be concerned when Jehovah's Witnesses come to your door. Jehovah's Witnesses ask all their members to go from door to door. This includes known pedophiles. This policy is irresponsible and insulting to the public. It indicates either an ignorance or callous disregard for the fact that pedophiles often repeat their crimes if they are given an opportunity.
This is just one reason why many people ask to be put on the Jehovah's Witnesses' do not call list. They don't want pedophiles leering at their children or are concerned that there children might be in the yard or answer the door when the Witnesses make their rounds.