Ah, the perfect San Francisco date. Nothing says love like a sourdough bread bowl filled with New England clam chowder, a few hundred barking, stinky sea lions, and a blue square (aka registered sex offender) escorting an underage girl through the biggest tourist trap in the city. If you thought that buskers jumping out from behind garbage cans were the scariest thing about Fisherman's Wharf, now there's something else to keep you away from the......