To quote Monica Lewinskys ex-boyfriends wife, "What difference does it make?"
As soon as you get in the air and pressure changes, people start farting. Then you've got to breath that.
And while befuddling to some even Airbus has gone out of it's way to advertise that with their airplanes you'll have a "LONGER LARGER FART"
Exhaust from an engine or exhaust from your seat mate laying his head on your shoulder, which is worse?