FWIW, if you really don't want them to get their hands on your model, then you need to convert the model to another form which simply does not contain the primary content (so it cant be recovered).
So, perhaps convert it into a movie, an interactive sequence of images of the model rotated (a la 3dwarehouse) , etc etc.
Adding degenerates / zero-area geometry / component-per-face simply degrades their experience of your work.. which probably isn't good for business!
Adam