You generate the unpleasant atmosphere.
Stick to the rules and you won't have a problem.
The unpleasantness starts when you try to bring 2 or 3 bags in to the cabin: it starts when you turn up and have a check in bag that weighs 34Kgs.
There is no unpleasantness on board unless you assault / harass / intimidate the cabin crew: and then it occurs in the same way every way airline responds.