Signing up for the Do Not Call Registry clearly stops a lot of telemarketers (3 months later...), but definitely not all, as mister implies. The current bane of my home phone existence are sales calls that have not a human behind them, but some &*%$ pre-recorded message. You can "opt out", supposedly, if you answer the phone and press some button on your phone when the pitch is over, but if they pile up on your voicemail--as I let them do--there is no way to stop them. Lately it has been Dish Network marketers (I loved Dish, but no more...), and lots of "refinancing" folks. ARgh.