Do current machines ever do anything like that?
Have you ever seen a postscript file get sent to a laser printer that doesn't recognize it as postscript? They generally will try to print out the embedded binary font files as raw text. Tends to lead to it emptying its paper tray printing pages with a handful of glyphs on the first line and the rest of the page blank. And if you're foolish enough to keep feeding it more paper, it can usually exceed your supply of reams of paper before it's finished. Or until you power-cycle it and pray its not being cached by the print server...
If, in addition, every page fills with text from margin to margin, and the printer - even with a noise baffle - sounds like the inside of a heavy manufacturing facility, you'll be closer to what I experienced.
