La Opinión had a fascinating front-page piece yesterday about kiddies at Creek View Elementary School in Ontario regaling each other with a rhyme that translates as, "I don't want to go to Mexico ever again, again, again/Mexico stinks, stinks, stinks/There's a fat policeman at the door, door, door." Parents and school officials are flipping out, and La Opinión even interviews some psychologist who warns that "the danger" of such a chant toward a student's self-esteem "can be profound." Even cr