Well, if they really need all that information, they could just ask the (US) National Big Ear - that NSA that Our Leader is so fond of.

I remember a Harvard Lampoon parody on "Desiderata" - you know, that one that starts off with "Go quietly amid the noise and haste..." The Lampoon's "Deteriorata" said, "Know thyself. If you need help, contact your local FBI." Now we can use the NSA instead!

If there wasn't a USPS, nut-cases couldn't send hate mail...