Your basic triple threat

According to the flyer in this month's utility bill, the city of Oklahoma City is setting up a drop on Saturday, 11 September, at the Fairgrounds, for the following sorta-hazardous wastes:

• Used tires;
  
• Used computer equipment;
  
• Presumably unused ammunition.
  

I've got to wonder how they decided on that particular grouping. They won't take tires at the Household Hazardous Waste facility.