They came. They smoked. They left more than seven tons of trash. After more than 8,000 people flocked Golden Gate Park on Wednesday, or 4/20, as the San Francisco’s marijuana-loving community call it, countless bottles of Shasta soda, beer cans, Fruit Loops boxes and butts were left scattered across the grassy, green lawn. "We think we will end up with over 15,000 pounds of trash," San Francisco Recreation and Park General Manager Phil Ginsburg said Thursday morning. "Yes, it's impactful to our park." Ginsburg noted the mess was an improvement from last year. That trashy haul tipped the scales at...