I hate when dumb people jam boxes in the drop boxes. Love trying to get them out. It has to be the same people that can't tell the difference between USPS and UPS.
I had a drop box in a blockbuster video parking lot on my route. I used to get dvd's returned there on a weekly basis. I would usually keep them in there for a day or two, just so they would have a late fee and stop doing it.
I used to take the mail that was put in one of my letterboxes and redeposit it into the Fedex box next to it. For all I knew the Fedex driver could have been the one who put it there.