What a horribly intolerant thing to call our undocumented guest workers!
I never bought the pig story. Huge lettuce fields and spinach fields are sprayed with 'treated' liquid sewage from treatment plants in some production systems. They are not supposed to be srayed too near the harevsting date, however, since sunlight tends to kill the e-coli off if several days pass from fertilizing to harvesting. Someone screwed up and the pig story was released to avoid the truth of how our 'greens' are mass grown.