Function Creep is what occurs when an item, process, or procedure designed for a specific purpose ends up serving another purpose for which it was never planned to perform. http://functioncreep.blogspot.com
A process in which one tool which is used for a particular reason, is applied to a new, usually larger, set of purposes.
As copyright has undergone these sort changes it is a good example of function creep. It is feared that national identification card systems would suffer the same fate, and in the process decrease individual privacy.