Interesting! I have noticed that on many of my trans-Atlantic flights, the person sitting next to me is always passing gas. Bad gas. I thought it was a bit more than coincidence that I always got seated next Mr. or Mrs. Flatulence.
I personally don't have a gas problem on flights.
Note for the gassy folks: is there any way that you can NOT release gas while sitting next to me? I (and your fellow passengers) would certainly appreciate that.