There are those who methodically create a stock pile and then there are those who dig and devour every morsel they find. There are leg men vs. body people, garlic butter dunkers vs. lemon mayonnaise dippers. Head to most restaurants during the Winter and early Spring months in San Francisco and you are sure to spot this motley group of people. Who are they? They are devoted dungeness crab eaters. Crab is not only a meal, but also a ritual for San Franciscans. Ask most seafood loving locals, and they will tell you a story or two of long nights with friends gathered around a table filled with cooked crab. A dungeness…