I don't quite buy that this is just protectionism for some incumbent junk mailer businesses. Perhaps the Postmaster General is actually just trying to protect the Postal Service in general. If the 400 Junk Mailers are the bulk of mail sent through the USPS, then knowingly bringing in a technology that disrupts and destroys that business possibly destroys the USPS itself. The USPS has been said to be struggling because of the move to digital over the past 20 years, so taking away the junk mailers brings us down to what... the birthday and holiday cards peoples' grandmas send because they are too old to just write 'Happy Birthday!!! :)' on Facebook? To keep that giant operation going will create rate hikes and then it will cost granny $45 to send that card.
Also, if people start realizing their letters are being scanned and sent to people digitally, why pay for postage at all and just start sending those people the letters in digital form (and cut out the postmen/middlemen) like many companies are already trying to do.
When did search warrants become search and destroy warrants? Wrong house... understandable, everyone gets confused when going to a tri-plex for the first time. Hand-cuffed and left on the floor... well maybe the guy was physically fit and the out of shape cops were intimidated. But to trash the house and break all of his stuff just because they aren't finding what you are looking for? They aren't cops, they are thugs tossing the place.