I believe it's correct. They're not expecting normal people to do supply chain analysis, but they are expecting people who see a ton of second hand drug-store p

I believe it's correct. They're not expecting normal people to do supply chain analysis, but they are expecting people who see a ton of second hand drug-store products in a bag in a dodgy warehouse run by someone who doesn't really seem like a drug-store distributor to say 'wait a second that might be not 100% legitimate'. It's not an unusual concept in common law. It's like manslaughter - you can have had absolutely not intention whatsoever to kill or harm someone, but still be held responsible for their death because you weren't careful enough.