Nothing seems to put people off more than talking about flying saucers. Not me, I love talking about them. But normal folks. If I go up to someone and say "Hey, I just saw a flying saucer," that person will likely move away from me.
So, in fiction, I also sense a discomfort in dealing with flying saucers. I await the cover of my new novella with dread and trepidation. The story contains Martian spheres (flying spheres). This is inspired by a reported UFO seen over the Civil War battle of Vicksburg. But will the cover have a saucer on it or merely a little green man ? That is the question.