Thank you everyone for taking my question seriously and answering with thoughtful responses. I've had some great experiences on this forum, and appreciate the opinions
Do you think, just as a safeguard, Calibre should have a written "ebook exemption" added to its licensing? For example, some GPL fonts have a "font exemption", wherein these specific exempted fonts can be embedded without hypothetically turning their overall project into a GPL project.
I think the whole output thing is a lot simpler when the output is non-code. I.e. using OpenOffice.org to print out a letter on a physical piece of paper. There's no gray there, right?