Some are likely calling Ernest Barnes, a wheat farmer in Kansas, an opportunistic ambulance chaser. He is suing Monsanto because last week's discovery of biotech wheat in an Oregon field places his livelihood "at serious risk." He can only say "at risk" because 1) he likely grows a very different kind of plant than the soft white wheat implicated in Oregon, and 2) wheat futures have bounced along seemingly unaffected by the incident. The occurrence is so unusual that sabotage is suspected, which makes Mr. Barnes' suit the equivalent of marathon races in other cities suing Boston for not having prevented the Tsarnaev brothers' bombing attack...