Removing the default author for PDFs
You are nit picking there! :) 

It’s a complicated one, but I believe that it might be possible to experiment with: 

Automator (have an action that takes a PDF and modifies it’s metadata)

PDF Services (have a service that is “Save As My AuthorLess PDF”) ;)

AppleScript (Both/All of the above)

I suggest you google around those concepts. This is a good starting point. All in all, the idea of your script is to use the Automator’s action called: “Set PDF Metadata” (you could then put blank data on purpose):



If you create a PDF Service capable of replacing the default one, but that also sets the metadata to Blank, you’ve won.