RichT & Barcadi Walla, having severe nut allergies in the family which restricts the airlines that we can fly with - I feel that your comments may be somewhat misplaced and inaccurate.
Taking my lead here from the Anaphylaxis Campaign, these warnings about nuts are usually applied in the circumstances that could best described as "This product has been manufactured in a factory where nuts may be present" - surely more appropriate to this case?
Personally I would like to see how RyanAir would cope if Orange wanted to match Vodaphone and asked for a logo jet - nice orange tail, phone number down the side... but then if it lived to it's namesake it probably wouldn't be able to cover certain aiports