If you know you intend on opening the file, but do NOT intend on saving anything back, then you can use the 'Detach from Central' option. In this scenario, any changes you make to the file, including panning in views, etc, do not transparently borrow the elements from the original central file, thus avoiding any iconfusion.
Martin Schmid
Product Line Manager
Mechanical Detailing and Electrical Design
Architecture, Engineering, and Construction
Autodesk, Inc.