After spending 10 hours sitting in the Brussels airport, mostly observing, I made several observations on airport etiquette.
 1. Since airplanes are our fastest mode of transport, get into the mode, walk and live fast while in the airport.
 2. Cell phones are designed for airports. They give opportunity to call the ones you left and tell them how much you already miss them as well as call ahead to those you will meet to tell them how good it feels to have a moment allone.
 3. Never make eye contact with another. That could lead to a relationship that you have no time for.
 4. Your world at the airport in small, in fact, it includes only you. So even when physically surrounded by others, talk as loud and personal on your cell just as if you were totally alone.
 5. Get the latest in baggage technology, a preferably metal clad container, 4 wheels and a long handle. It seems just as if you were walking your dog.

 Speaking of luggage, I traveled this trip with 2 pieces, no wheels and no long handle. An additional uniqueness of my pieces was that among the thousands of luggage pieces I observed, mine and mine alone carried a duct tape repair job on one corner. It was always very easily identified on the baggage belt.