Classic tragedy of the commons. Unfair competition for anyone trying to do it honestly. It certainly made adulterating super easy, and in no small part led to

Classic tragedy of the commons. Unfair competition for anyone trying to do it honestly. It certainly made adulterating super easy, and in no small part led to the food safety laws both sides of the Atlantic, and the UK's trading standards. Things like alum in flour, or other equally unpleasant additives. More recent variations on the theme have been more aware of the tendency to cheat, so have tried to make it a little more difficult. We'll always need spot checks from trading standards for restaurants and shops as someone will always try.