If that worked telescammers like you would be out of jobs in no time! And you wouldn't have a reason to come to sites like this to try to trick people into answering you scammy calls.
Why is everyone so afraid to answer a call from an unrecognized number? Even if telling them to never call again doesn't work, not answering will only guarantee a later call from them. Besides, since when is picking up a call from an unrecognized number such a terrible thing?
Received call at 9:38 AM on June 06, 2013 (today, as of this posting). Caller ID says "MISSOURI". (I live in south Kansas City, Missouri.) I did not pick up and the call went to the answering machine, which I have set to turn on after just four rings. They hung up before that time and no message was left. Likely some sort of SCAM call or perhaps telemarketing.