In San Francisco, autonomous crime-fighting robots that are used to patrol parking lots, sports arenas, and tech company campuses are now being deployed to keep away homeless people. The San Francisco Business Times reported last week that the San Francisco SPCA, an animal advocacy and pet adoption group, put a security robot to work outside its facilities in the gentrifying Mission neighborhood. The robot's presence is meant to deter homeless people from setting up camps along the sidewalks. Last week, the City of San Francisco ordered the SF SPCA to keep its robot off the streets or be fined...