I spent my misbegotten youth in the water at Bolinas, CA for as long as possible on a 10' Sonny Vardeman board, and never saw a white there. Drake's, hell yes, but Bolinas/Stinson? no. Along comes the "marine mammal protection act" making it illegal for the salmon fishers to shoot sea lions, and voila, white sharks everywhere. Numerous sightings, and attacks are not infrequent there now. Good Lord, the stories I could tell about diving in the Farrallones off the coast there!