The myth about contacting police during ATM Robbery

I received an email recently that talked about using reverse pin# to contact police in ATM emergency. I did some research online and unfortunately that technology is not implement yet.

Email Excerpt:
If you should ever be forced by a robber to withdraw money from an ATM  machine, you can notify the police by entering your Pin # in reverse. For   example if your pin number is 1234 then you would put in 4321.

The ATM recognizes that your pin number is backwards from the ATM card you placed in the machine. The machine will still give you the money you, but unknown to the robber, the police will be immediately to help you. This information was recently broadcasted on FOX TV and it states that it is seldom used because people don't know it exists.

Check this site that proves it wrong