The danger is that Mr Gent's typeof bonus will catch on, encouraging other managers to do deals irrespective of whether they create value for shareholders.
Two-thirds of the U.S. adult population is either overweight or obese while a growing number of adolescents are climbing into the danger range, many developing type 2 diabetes at younger and younger ages.
But where the boundaries between danger, potential damage and safety lie, and how they vary with the type and number of ash particles, was not taken into account in the decisions to close airspace.