The oil spill affects the crab fishermen, and probably other fishermen, too. It also affects the restaurants, tourists, excursion boats, private boats, ferry boats -- not to mention the wildlife, fish, fowl, beaches. Also, Angel Island, Alcatraz... So much of our industry and economy is based on the Bay.
Commercial crab boats won't go out in oil-tainted waters. See link for dozens of new articles.
OIL AND THE ENVIRONMENT, Energy Information Administration
http://www.eia.doe.gov/kids/energyfacts/sources/non-renewable/oil.html#Environment