When flying home from IST-CDG-PHL, (back in 2007 when AF still flew to PHL) AF went on strike as we made it to Paris, and our PHL flight was canceled. After trying to re-route us via England or Spain, they finally put us on a VERY delayed Delta flight to ATL. Apparently this Delta flight left CDG about 6 hours earlier, developed some mechanical issue and had to return to Paris. We lucked out big time!! This was the first and only time my bags have been lost. One bag arrived at my door about 3 days later, and the second bag showed up almost 7 days after that. My travel companion said the only reason the ticket agent got us on that flight was because I speak fluent French. Who knows!! ....but I must say, that flight from CDG-ATL was the LONGEST 9 hours of my life.
I think there are two major issues here. The first one is obviously the carry-ons. Some people feel the need to bring their entire lives into what can, or sometimes cannot fit in the overhead bins. This never made sense to me.
The second issue is general stupidity. How many times have I boarded a plane to find someone in my seat? Perhaps if airlines would print the seat numbers on the head-rest "flaps," people would not have such "issues" finding their designated seat.