Slightly different tack - a couple of years back Mrs spiney was travelling LHR - HKG on BA World Traveller +... Plane was full-full. The guy sitting next to her (it wasn't me I hasten to add) was absolutely honking... don't think he'd washed for a week.. well ripe he was... Before departure my wife asked to be moved - anywhere. The CSD (Lady) questioned her motives saying WT+ and Economy were both full - until she smelled the guy... Mrs s was upgraded to Club.... Nice.