Now some technical boring details. Uninterested readers, please skip it. :-)
but the Creator Property in a .docx file is set by Microsoft Word to indicate what application created the docuмent, NOT who the author is.
No, sir. MS-Word or Open-/Libreoffice or any other Office application which can write MS-Word files, uses the docuмent file's "created by" property to set the author who created the file, and the time-stamp when he did so.
During the installation process of Office applications (or for some: when a user starts the application for the very first time), they typically ask for the first and last name, initials, company, and several other Office properties.
Smart administrators, companies,
schools or smart users set these properties on a per-user basis. So actually every user on a multi-user computer can have his own name in a typical Office's configuration.
Either way, once you create a new docuмent file -- no matter if it's an OpenDocuмent, a ".doc" Word or a ".docx" Word file -- the Office application writes these name, company, etc user properties into the docuмent file's properties.
And this is the whole idea of these Office file properties, so that when several authors work on the same docuмent file (at different times), you nicely see who created and who changed what and when.
I did just check it in practice with an Open-/Libreoffice installation for several users on a single machine, and indeed the Office file's properties say in my native language (translated on-the-fly to English): "Created on: 17 April 2013, 21:35:00, <My First Name, My Last Name>".
And when you open the
Pfluger-Letter, you see the very same properties dialogue and it says: "Created on: 6 Jan 2011, 16:29:00, MK28".
And you open the docProps folder of that ".docx" zip file, and in the core.xml there's these meta informations like author ("MK28" in our case), saving time-stamp, etc, as it should be according to the "Office Open XML" Wiki.
Now, VinniF, or somebody else, please repeat these steps with your Office installation -- provided your Office's name, initials etc properties are not empty -- in order to verify that indeed the user's Office name/initials properties go rightly into a created Office docuмent file. No "tampering" needed. And no "forgery" needed. Just save-as, close, and open-file menu.