A common mistake that people make when trying to design something completely foolproof was to underestimate the ingenuity of complete fools.
From Mostly Harmless by Douglas Adams
Technical reports: EEG, PCA, ICA, Artificial Intelligence
Programming homepage: Delphi and C++ libraries
3Shape: 3D scanners and CAD software (a company I work for)
Everything should be made as simple as possible, but no simpler.