I think when someone says "come fly the friendly skies" it may make you think of unfriendly things. It is a by product of the phrase. Also many people will make jokes out of that because flying isn't very friendly when you have a TSA
person going through your belongings, and are delayed when ORD
is snowed in. Flying by default isn't all that friendly, so I am glad that they changed to a modern catch phrase, although the friendly skies was a great one for the 90s.
Awesome ads by the way. They are quite relaxing.
If you have never designed an airplane part before, let the real designers do the work!