[AnimalMuppet]

If I understand correctly, odor is in fact one explicitly-stated valid reason for being removed from an aircraft. (Not at 42,000 feet, of course.)

[cmurf]

Yes, for United it's contract of carriage rule 21, H, reason 16: malodorous condition. It's funny that this is under the auspices of safety though. I guess the logic is if someone stinks enough it might cause disorderly conduct by other passengers?

[jacquesm]

Usually caused by crappy airline food...