The jerks call here on my cell all hours of day and night.  I block my number, call them back and they just hand their cell from one person to the next, (reminds me of the "Clampetts", sounds like them, also!) Then they want to know "who's this".  I then explain that they have to stop their annoying calls and then it's "Oh, you have the wrong number, it ain't us", even though I tell them the number I have dialed IS INDEED THE NUMBER that the calls come from.  A friend once said to me that she feels a person should have to be tested and licensed before they could access a phone.  Judging from these idiots, I AGREE!