Continuing the topic of being proactive about telling aircraft passengers what to expect, a South African airline called Kulula Air has painted labels and explanations on the exterior of the aircraft. They've even answered one of my pet peeves by labelling the right cockpit occupant "co-captain - the other pilot on the pa system" to alleviate the fears of all those who believe that "co-pilot" is some sort of apprenticeship for someone who can't fly the airplane yet but nevertheless is the passengers' only hope should anything happen to the captain. I wonder if the "sun roof" label was originally concocted for the older B737 models with the eyebrow window, a feature finally discontinued about fifty years after pilots stopped needing an upward-facing window to take sightings with their sextants.
Despite the humour and the bright friendliness of this paint scheme, I wouldn't have voted for it, for a passenger airline. I think it will subconsciously frighten some people. A student of mine was once greatly discomfited by seeing a training aircraft from which the rear bulkhead had been removed. I showed it to the student so that she could see the cables that ran back to the tail, conveying her control movements to the rudder, elevator and trim. The simplicity of it startled her. She wanted there to be unseen magic holding the airplane aloft, not ordinary cables. I think a lot of airline passengers don't want to be reminded that their safety depends on the sum of a lot of nameable parts and people. They want the smooth shiny paint (and passengers will base their assessment of your aircraft safety entirely on the quality of the paint) to assure them that everything inside is there. It's the same reason you put pilots in white shirts and ties, and jackets with lots of stripes on them.