I think farting is like a call of nature, u cannot really do
much about it, just roll down the windows, hopefully TDs are not
the one who fart, but frankly, our digestive system are all mostly
in bad shape, this is one of the Occupation Health
Hazard we have to face, we should therefore, learn to time our
eating, diet and toilet business to archieve a consistancy
otherwise, bloating, gastric, and worst organ ulcer can be bad
for us.
As for passengers, we have not much control over it, but by the
shift of passenger backside, i know he/she is going to fart, then
roll down the window, he/she will understand. Especially those you
pick up from food court or resturant, after food, lots of
farting.