EXPLAIN TO ME why using a box which I or someone else ALREADY PAID FOR is any business of the USPS?
If the box is reusable, it is far more "green" than so called "recycling"
If I'm NOT shipping USPS, or NOT using priority mail, I need a box, do I not? Are these boxes not already paid for?
This would be the same thing as if Folger's coffee told me I cannot use a coffee can for a nut bucket!!!!