Onyx, your closing argument annoys me. It is not the same as eating in a cafe or restaurant: the culture is different. It is more akin to fast food - there you buy the food before you eat, non? In a shop, there is the expectation that you buy before you eat also. In a restaurant, there is the promise of payment, you have informed the staff of your consumption by ordering the food. In a shop there is not that same promise.

Although our local supermarket does hand out free samples of food, which I do let Liebs eat in the shop. They give it away, we don't have to buy it.