The problem with this argument is that prisons are a different place legally than the rest of the world. In addition to the the limited rights of the prisoners

The problem with this argument is that prisons are a different place legally than the rest of the world. In addition to the the limited rights of the prisoners, they also impose limited rights on the people working there. If the prison authorities and whatever legislature has authority over the prison decide that there are no "authorized users" within a prison then there is no violation of the act.