Dave is an executive director of a drug rehabilitation nonprofit organization that relies heavily on the use of unpaid volunteers on staff. The board of directors developed employee-related policies and posted them in an employee handbook. Each new paid and volunteer employee staff member undergoes an orientation training program. This training includes these policies and potential consequences for violation. One of these policies prohibits the use of the organization's telephone and Internet for personal reasons. Barbara is a volunteer who has been with the organization for 3 years working primarily as a clerical employee. Dave recently caught Barbara for a third time misusing the Internet and spending an unusually long time on personal calls. She has been given a verbal and written reprimand in the past. When Barbara is not on the telephone and Internet for personal reasons, she is a very valuable volunteer. Advise Dave on what to do next. Explain your rationale.