On March 4, 2014 USPS was assigned a patent (8,661,862) developed by Ryszard K. Mikolajczyk, Chicago, and Taurris D. Baskerville, Schaumburg, Ill., for a “cluster box mail delivery unit having security features.” The patent application was filed on June 29, 2005 (11/168,471).
One image of the design
On February 6, 2012, in the Kandiyohi County, Minnesota District Court, Cherity Perez, former Secretary-Treasurer of American Postal Workers Union (APWU) Local 631 (located in Willmar, Minn.), pled guilty to theft, in violation of Minnesota State Statute 609.52.2(1).
They can just use a bigger crowbar.