The shopping cart test is really about the design and layout of the shopping cart return gates. than anything.
The more of these you have. the more people will return
The lazier you are with the placement of these, the lazier people will be with the returns.
I've been to grocery stores where you basically had to bring the cart all the way back inside the store in order to return it. Fukk that
I would just do my best to ensure its not going to roll into somebody elses car. like propping it up on the curb in that case
My responsible is to the other customers to not damage their cars.
Not to the stores employees to make sure they are organized. They get paid for that themselves