Good behaviour is rewarded, bad behaviour is dismissed. This is a simple principle apply in life and teach to our little ones, but also it seems to be difficult to grasp for some people when travelling.
In the service industry, customers, clients, or in this case; passengers are always right. This concept comes from the business point of view that is cheaper to maintain an existing customer than gain a new one.
However, when you are at 40,000 feet in the air, it certainly won’t help you to rudely complain and demand what you believe you are entitled to. Actually all the opposite, it will get you nothing.
If the cart has run out of chicken by the time it gets to your row, try nicely mentioning you would like to try the chicken if the can manage to find one for you. I guarantee you that your flight attendant will keep your face in mind when a spare chicken appears. You may even get a nice First Class chicken.
You’re too tall for your seat and you can’t fit comfortably. Instead of ranting about why the seat is “too small” to the flight attendant, try politely asking if there is any other seat by an emergency exit or a bulkhead because of your height. Again, being polite will get you that spacious seat or even a free upgrade.
Of course, the norm is the opposite. And flight attendants are experts at dealing with these kind of behaviour. Be rude and nasty and you will get nothing more than minimal service and no effort whatsoever to solve that issue that is so important to you.