There is an entire agency that focuses on Food and Drugs in America, and its similar around the world. We have many rules on food.

Food is actually a great place to think about social media, because there was a time where the FDA didnt exist. Its need was felt after cities grew larger and the food supply chain became longer. At that point food could be adultered and the old systems which people relied on to know the provenance of their food failed.

Some of the things that changed this was when people started doing indepedent testing and finding out exactly how much adultery was actually taking place.

Eventually we got rules about what was to be done, which we don't consider anymore since its part of daily life.