National Security is partly dependent on a reliable Sensitive Document control procedure. It is not a good idea to let sensitive information get into anyone's hands not having a need-to-know. Procedures, some classified, have been developed to control document (information) distribution. The procedures are time consuming, not what a person's primary job is, and hence prone to be glossed over or partially ignored. This article about security classification is based on my experiences in the days when I was employed and had a security clearance.
The original article about fooling people, pleasing people, and the similarity to lying to people was incoherent. Therefore it is gone. There was some background information worth keeping. It's about President Lincoln's Fooling People quote. It follows.