It's bad to misuse email to harm someone else.
Betty is reviewing her department's Q2 sales performance numbers spreadsheet.
Betty wants to improve her department's apparent performance relative to her rival, Sara's, section.
Betty sends a personal email to each of her people give personalized suggestions and encouragement.
Betty crafts a fake series of emails that make it appear that Sara is sabotaging Betty's team's sales numbers and shows it to her supervisor.
Betty's department works harder and improves their job performance in the next quarter.
The supervisor adjusts Betty's numbers and fires Sara, Sara appeals, but there is no proof the emails were fake.