Some time ago, a friend was troubled by many automated calls, and did some research. What he found: Remember the sound you get when you dial a number that is no longer in service? Those three tones, 3 note, de~ dee~ dee, followed by "you have reached a number that is no longer in service..."? It's called a Special Information Tone. Well, Google it, and record that sound at the beginning of your outgoing announcement on your voice mail or answering machine. It seems that those three notes signal the computer that generates the calls (or the person calling) that that number isn't a valid number, and they delete your number from their calling list. I can't say for sure this works, but maybe worth a few minutes to those troubled by too many unwanted calls.
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