i have my answering machine set so it rings 2 times then say hello and it gets those telemarketers every time and when that don't work i use alot of the tacktics you guys do a guy once wouldn't stop bothering a friend of mine about basement sealing eventhough the guy told him he didn't have a basement so he came to the guys house and found out. you dont have a basement friend said i tried to tell you that. what a waste of time.