A well-drafted computer-use policy can provide evidence to uphold a termination for cause and can protect an employer from harassment claims, as recent case law illustrates.
The scene is well-known in the workplace: an employee receives an e-mail joke or photo from a colleague down the hall, has a giggle, and forwards the message to other colleagues, friends at other organizations, and relatives who might appreciate the joke. In minutes, a complete cyber network is created, and it has passed along a message.
Sometimes the message is innocuous, e.g., it involves cute images or funny expressions. Other times, it involves racist, sexist or pornographic jokes or images.