Look guys - there is a simple solution for these unwanted calls. Buy the Digitone Call Blocker from Digitone Communications.
If a number calls that you don't want to hear from, hit the Block button. From then on, if you have the Call Blocker somewhere in your house, the phone will ring once and then stop. If you can position the Call Blocker as the first connection, your phones will not ring at all for blocked calls. Only notice you will get is a flashing red light on the Call Blocker.
You can also block entire area codes (great during elections).
I'm sure there are other devices out there that will perform the same function. Get one and get some relief!