Caller ID is not always true

I read an article that discussed Scam artists using the ability to specify your own caller ID to fool people into thinking they are calling from a particular place. Now, without incriminating myself, allow me just to say that if you have your own telephone system and an ISDN line, this has always been possible. It is trivial to send any number you want. If you want the WHITE HOUSE to show up on a caller ID, you send 202-456-1414 to the phone company and it shows up on the caller ID. Qwest even bills incorrectly based on the number you send. So, regardless if you have an Internet based phone (like Vonage) or a regular POTS line (believe it or not, that really does stand for Plain Old Telephone Service). I love the phone business!