After reading threads on flyers and mailboxes I decided to stop a mailman to ask about restriction for my area. You wouldn't believe what this guy said. He was pulling flyers left in mailboxes and taking them back to his supervisor. His supervisor called him in to discuss it and stated that they had received so many calls from irrate business owners regarding the removal of flyers that the Supervisor told the mailman not to remove any more flyers from that point on. He told me that I could actually leave the flyers anywhere on or in the box as long as it did not obstruct the opening and closing of the door. Sounds like a gamble but it came directly from the horses mouth. It's strange but it's a $1000 fine for this and business owner are actually calling the post office and admitting that their doing it.