Just received a call from "Dave" wanting to know roughly how many windows I need to be replacing within the next 6 month.  So I asked him "roughly, can you tell me how you got my phone number?"  He paused and repeated the same question.  So I then informed him that, I do not need windows; I did not request this information, and if they called again I would contact the FCC.  Then I told him to tell that to his manager.  http://www.fcc.gov/guides/unwanted-telephone-marketing-calls