I answer all unsolicited calls with a very clear and distinctive: "You have reached the Town's City Morgue, May I haelp you?". I get an I'm sorry then another call usually comes and again I answer,' Thius is the Town's City Morgue, May I help you?", I get the "I'm, sorry, I will take you off the list again", then I respond with, "You have called an official Town line and your number has been noted, do not call this number again".. So far it has worked.
So far, after filing an official F.T.C. complaint against Mike Huckabee, I have not received a call in 6 weeks.