I used to work on the benefit IT systems (Income Support, Job Seekers Allowance) etc., and they had a concept of 'sensitivity'.

Locally Sensitive - a value of 0 or 1. 1 would mean that the person was only sensitive in that particular office. It might mean something like the person was related to a member of staff at the office.

Nationally Sensitive - 1 = Transexual, 2 = something else, and 3 = VIP (Politician, celebrity etc.)

During a migration onto a new system, we managed to mess up the Nationally Sensitive settings so that everybody that was not 0 got changed to 1....