Legally, yes, sometimes the source of the copying is in fact criminally culpable (the print shop), but usually only if they understood what was going on.
If a print shop in Los Angeles were to serve a high volume of student customers, and the print shop knew they were breaking the law by making copies of textbooks and selling them, the print shop would have a massive liability over its head. It would require proving that the print shop knew what the students were doing.
Yes, that's what's at trial here. But in the post I replied to, I was taking issue with the insinuation that "OF COURSE that's what was happening here!" As if to imply online storage with easy download is inherently about piracy.
If a print shop in Los Angeles were to serve a high volume of student customers, and the print shop knew they were breaking the law by making copies of textbooks and selling them, the print shop would have a massive liability over its head. It would require proving that the print shop knew what the students were doing.