Earlier quoted context omitted.
It's not obvious to me. If I photocopy an ilegal ad at Kinko's, is it Kinko's fault? If I send an illegal ad via first class mail, is it USPS's fault?
Sometimes. They sold it to you. Example: I worked at a pharmacy with the self-serve digital photo services. A customer brought in a CD and made christmas cards from a family picture. It turns out the picture was taken by a local photographer the customer had hired. The pharmacy I worked at got the legal notice. Supposedly, we were partly to blame since we profited off of the cards the customer printed. Nevermind the…
...Why does a pharmacy print photographies? I've never heard of a pharmacy selling something that isn't drugs.