Wikipedia’s entry on the debate (first i heard of this) against people who want milk pasteurized and those who like their milk chock full of bacteria.
Commercial distribution of packaged raw milk is prohibited in most countries. However, 28 US states allow sales of raw milk, and in other parts of the world, raw milk can often be bought directly from the farmer. In England, about 200 producers sell raw, or “green top” milk direct to consumers, either at the farm or through a delivery service. Raw milk is sometimes distributed through a share program, wherein the consumer owns a share in the dairy animal or the herd, and can be considered to be consuming milk from their own animal. In the United States, Arizona, California, and Washington allow raw milk sales in retail stores with appropriate warning labelling.