My dad worked for the US Postal Service in Missouri for more than 3 decades. He never brought gifts home and now I understand why. There are rules about what postal carriers/mail men/mail women can accept as gifts and I'm genuinely surprised at the list of do's and don'ts.
If you've driven by the Hannibal Post Office today, you have probably noticed the large chain link fence that is being installed around the Hannibal Federal Building, Courthouse and Post Office.