Hey Turkish Ghoulish Delight, I saw that. I'm not sure I really get the point. About the only use I can see for that is verifying that the document I gave someone is really the one I gave then and not a forgery (good for wills and such). I don't see how that can be used to erode privacy since there is no way to trace it back.

Surely the government can easily start requiring paper manufacturers to fingerprint all of their paper as part of the packing process. Then it's simple to know to whom each sheet was sold.