If you listen to environmental activists these days, you might think that snap, crackle, and pop coming from your Rice Krispies is the sound of impending doom. This week they're trying to scare consumers about bioengineered, or genetically modified, rice. But when it comes to scare stories about biotech food, consumers should take these warnings with a grain of salt. On Friday, Bayer CropScience and the U.S. Department of Agriculture announced that traces of an unapproved bioengineered rice variety were found in harvested rice from the nation's southern rice-growing region that includes Arkansas, Louisiana, Mississippi, Missouri, and Texas. The biotech...