C'mon. "Documentary photography" is a term that connotes a serious intent. Mixing pinhole cameras with that makes it into just playing games. Piddling around. I see no redeeming quality in this repeated infatuation with re-inventing the wheel. So all of us in the photographic "know", know a tiny pinprick in an oatmeal tube can cast an image. So what? Non-photographic people don't know that. All they see is a blurry picture. And all I see is a blurry picture. Pointless.
If you want to do a documentary of the locations of trench warfare, get a camera with a lens and get busy.