You should not steal from someone you work with.
Chris is at work when his manager asks him to note something down.
Chris wants to grab a pen.
Chris goes back to his desk and grabs one of his own pens to make notes with.
Chris looks at the nearest desk and sees a pen on it, so he grabs that and starts making notes.
Chris' reputation in the office remains the same as no incident of note occurs.
The  pen's owner is annoyed that Chris just took his pen and Chris' reputation in the office suffers.