Beach bums took over San Francisco’s most coveted waterfront real estate in 1990 and have been making a public display of themselves ever since, canoodling, belching, scratching their naked backsides and gleefully shoving one another off the docks. Naturally these unkempt squatters became San Francisco’s favorite mascots, and since California law requires boats to make way for marine mammals, yacht owners have to relinquish valuable slips to accommodate as many as 1300 sea lions who ‘haul out’ onto the docks between January and July, and whenever else they feel like sunbathing.