The point is that there is no validation of these numbers. I can call you and list my caller ID as your own number, and when you get a call from me, it will sho

The point is that there is no validation of these numbers. I can call you and list my caller ID as your own number, and when you get a call from me, it will show up on your phone as being from your number. And the phone company will say "Oh no there's nothing we can do about this!"