Goodbye Samizdat

Printers have a special place in the history of liberty.  It is very disturbing, therefore, to learn that documents printed on color printers from Xerox, HP and other manufacturers contain secret government codes identifying the time, date and serial number of the printer.  No, I am not kidding.  These codes can be read under magnifying glass and special light.  The Electronic Frontier Foundation broke one of the codes and is pursuing more information. 

Would the Berlin Wall have fallen if East European governments had access to this kind of technology twenty years ago?