SAVANNAH, Ga. — Federal regulators are considering a snack attack on the nation's airlines that would restrict or even completely ban serving peanuts on commercial flights. Advocates say the move would ease fears and potential harm to an estimated 1.8 million Americans who suffer from peanut allergies. Peanut farmers and food packagers, however, see it as overreaching and unfair to their legume. "The peanut is such a great snack and such an American snack," says Martin Kanan, CEO of the King Nut Companies, an Ohio company that packages the peanuts served by most U.S.