You throw the bag in the garbage, no harm done right?You don't tie the bag tight and leave it out on the street.
The bag sits inside your garbage can until you place all of your waste in the street. Monday comes and your local garbage man throws your garbage bag inside the truck to get crushed. As he throws the bag, your wrapper flies out onto the street and flips over the car and gets carried by the wind.
The truck moves onto the next house until it makes its way to the facility.