As a former Delta Flight Attendant - I have helped mothers change diapers on my jump seat - in the back of an empty row of seats far removed from other passengers - and (with blankets) on the floor of the galley area. There is no good place to change a diaper on an airplane - unfortunately....
How about the wing?
Unfortunately, we have the idiots, the conceits, the rude, and the self-absorbed that are allowed to fly too, and as well, exposure to them in a confined area is sometimes also a part of our lives.
People have gotten far too frightened of each other. We've been gradually seduced into believing the worst about each other -- therefore, TAKE.
Asking those around you, on a plane, if they would or wouldn't object to your changing your baby's nappy -- respects them. And if they say "NO" -- you go to step 2 which involves finding another place to change baby's diaper.
THESE ARE AMERICANS, our fellow citizens -- the most CHARITABLE people in the world!
IMO experience, I found wonderful people all over the place happy to help; willing to accommodate "my situation".
STalled car, rush hour? I got out to the people stuck behind me and apologized for impeding their progress. They jumped out, and not only helped me move my car to the side of the road; some stayed with me as "protection" until a tow truck arrived. START TALKING TO PEOPLE. STOP PRESUMING. That's what civility and good manners do -- it acknowledges that people are alive; and not just mere "dolts" or "human blobs" in our "shared space".
Has abortion taught us to view each other this way? Crime? Broken hearts? Feelings of rejection? Be Brave! (Be cautious and careful, certainly). DARE TO TREAT OTHERS WITH RESPECT AND COURTESY. If you are treated ill, turn the other cheek, and MOVE ON! There are MILLIONS of caring and wonderful citizens, right there, all around you.