This is just more stupid hype etc. For one, it would only work with color printers. If you only have a black cartridge in there then the yellow dots can't be printed. These sort of "OMG YOUR PRINT TRACKS YOU, OMG YOUR MOUSE TRACKS YOU, OMG DELL LAPTOPS LOG EVERY KEY YOU HIT" are just as stupid as the people who come up with the stories, the people who worry about and believe these things.