Homeless advocates and the city's leaders need to stop yelling at each other and work toward a solution -- One suggestion to address the chronic inappropriate street behavior in downtown San Francisco is a "sit-lie" law. Versions of such an ordinance are in effect in places like Philadelphia and Portland, Ore. They make it illegal for loiterers to stake out a spot on the sidewalk in front of a business and camp out there for the day.But mention it, and the reaction is immediate and polarizing. Homeless advocates insist that such laws criminalize the homeless. Angry, fed-up residents counter that...