Don't blame the postcomrade, they have to deliver what they are given, and putting it back in the box only increases their work load. They aren't even allowed to tell you how to reduce it. There is a limited opt out available. With other things, save up a bundle, stuff it into a prepaid envelope, and send it off- it will be delivered to the addressee to "recycle". Or just stuff it straight in the recycle bag unopened.