It's bad to steal office supplies.
Dustin needs ink in his printer at home and knows that his workplace has tons of ink.
Dustin wants to acquire ink for his home printer.
Dustin tells a coworker that he will be buying ink for his printer after work.
Dustin secretly takes cartridges of ink from his workplace, going against office policy, and brings them home.
Dustin's coworker gives him a coupon, and he saves money on the ink he purchases for his printer.
Dustin's coworker sees this and reports him to HR, which results in him being suspended.