I commented that it was fine to ignore knocking and to not open your door to strangers, adding that it is not even impolite.

In today's Miss Manners column, advice columnist Judith Martin responds to when is it acceptable to ignore unexpected knocks ...

Dear Annie: We recently moved into a new house, and within just three months, we’ve had a parade of solicitors knocking on our door or ringing our doorbell. After the sixth one, I became so frustrated ...