Consider the Following:

source: Scroll. See full picture and story in link at bottom of post.
Tempted to bring that cart home because you don't have a car? Think again. It's totally stealing! To even bring it off the Broulims parking lot is considered stealing.

There ARE fines for stealing!
If I were to turn you in for having a grocery cart here, it's up to $500! For a small basket it's $50! Just don't do it! Resist the temptation...I know you can! :)

It affects all of us!
When Broulim's has to pay for missing carts and/or go around town searching for carts in parking places, it can make the cost of groceries go up because the amount of gas and labor that goes into retrieving carts/baskets.

A story in the Scroll will give you the store director's official statement on the subject: http://www.byuicomm.net/story.php?c=1437