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.

Another scamming shill wants you to give it a chance to trick you out of your hard-earned money!

If I were to use my brain as I suggested earlier, scammers wouldn't have much of a chance.