Andre Barbosa can safely say that he has one of the nicest homes on the block in Boca Raton, Florida. But the 23-year-old Brazilian national does not own or even rent the palatial $2.5million estate legally - he is a squatter. Barbosa, originally from the neighboring Pompano Beach, moved into 580 Golden Harbour Drive in July Now he is threatening to use an obscure real estate law that allows people to claim a property as their own if they stay there for seven years. No one witnessed Barbosa breaking into the 7,522-squae foot, five-bedroom, six-bathroom waterfront home, so he cannot...