What do ya’ll do when there’s a non USPS parcel in the mailbox?

I threw a GOFO parcel on the ground today because I had my own to deliver. When I swung back around on the other side of the street the homeowner stopped me and told me if I drop mail I need to pick it up. I told him that it wasn’t mail and pointed at the label. He told me I still shouldn’t throw it on the ground. I told him I could take it back to the office if I wanted to. He walked away shaking his head all pissed off. lol sorry dude I’m not gonna do their job for them you’re mad at the wrong guy