Once while traveling on a package tour the agency chartered a plane because the tour was part of a larger group heading to Europe together. The airline was "World Airlines", they do (or did) a lot of charter for the military. The service was abysmal. While handing out bread rolls from a large plastic bag they skipped my row for some reason. I politely asked if I could have a roll as well, the flight attendant proceeded to literally throw it at me from a distance of about two rows.
On another flight to Asia the person behind me did not like that I put my seat back (at a very reasonable time for sleeping) and proceeded to hit and shake the chair....but never trying to talk to me.
Otherwise I have been fairly fortunate to not experience many issues in country.
Flying back from Europe to California.... a long, long flight.... and in front of me, in this VERY stuffed and crowded cabin.... was this man who last bathed 30 years ago. The SMELL was horrible, intolerable! I kept telling myself, "The sense of smell soon adjusts" but it never did. My only consultation was the many other fellow passengers who suffered with me.