This paper examines workplace surveillance and monitoring. It is argued that privacy is a moral right, and while such surveillance and monitoring can be justified in some circumstances, there is a presumption against the infringement of privacy. An account of privacy precedes consideration of various arguments frequently given for the surveillance and monitoring of employees, arguments which look at the benefits, or supposed benefits, to employees as well as to employers. The paper examines the general monitoring of work, and the monitoring of email, listservers and the World Wide Web. It is argued that many of the common justifications given for this surveillance and monitoring do not stand up to close scrutiny.