Should the farm also be responsible? Absolutely
On the condition that they disclosed the milk as raw, hard disagree.
Freedom means freedom to choose.
You can order raw or undercooked foods at a restaurant, there’s a small warning on the menu, and if you suffer any adverse affects from the decision the consequences are fully your own to bear - not the restaurant’s.
The farm shouldn’t have the responsibility of auditing peoples’ intentions with the product either. For all they know, it could have been puechased with the intent of making raw milk cheese.