Look at this great picture from the "blog" of John Currence. His "post" is about an Amish dairy where there is "no attendant, no camera, no security guard." The prices are listed and you are trusted to leave the correct amount for whatever you take. My grandfather had a vegetable stand that ran on the same principle. Someone asked him, "What if somebody takes food without paying?" My grandfather said, "They must need it." And what if they take the coffee can with the money in it? My grandfather said, "They must need it." But nobody ever took the money.
