An individual who works at a bookstore routinely takes home ballpoint pens and Post-it notes, uses the copy machine to make personal copies, and makes long-distance phone calls on the store's line. However, he would never consider stealing money from the cash register, even if he knew he could get away with it. What is this behavior called?

This behavior is called pilfering

Pilfering is somebody who's good at stealing without the other person acknowledging.  This commits to steal things, particularly from the place where you work. The sociology definition of pilfering is stealing lesser items in tiny amounts, usually again and again.

The study exposes that factors such as social solidarity amidst workers, social pressure and 'promoting' working circumstances as offering to mail robbery, pilfering and abusing of postal parcels.  Pilfering small items from manufacturers are all conventional behaviors since they are currently employed by a reasonably large dimension, if not bulk, of the population.

all of them make sense but, i would have to say ask someone who has been there/or lives there, and/or read recent newspapers from that city.

hope this !