(FORTUNE Magazine) – To the Editor: I protest the headline on a recent editorial, ''Quagmires Revisited,'' . . . which had . . . to do . . . with the situation in Afghanistan. It only adds to the unconscious slander we all engage in when we use as pejoratives words ((to)) describe wetlands . . . Quagmire . . . bogged down . . . swamped . . . morass . . . Used as metaphor, these words take on a sinister meaning, and it's my thesis that it lends power to the forces that are destroying our remaining wetlands . . . -- From a letter in the New York Times, by a writer for the Sierra Club Legal Defense Fund. (