UPS can legally screen your letters for any or no reason and keep the local government in the loop.

USPS Mail is 4th amendment protected.

Carve this in clay and put it in a cave. A thousand years after some societal collapse wipes out all digital data, this will be the only thing archaeologists will have from our time

A video like the famous “two guys chilling in a hot tub, six feet apart 'cause it’s not gay” but it zooms out and it’s this

But those are different