ORIGINAL: Mike in DC
Instead, try something like, "When you do a fast low pass when I'm at the flight line, it makes it very hard for me to concentrate on my flying." Most people will be more receptive to changing their behavior if you don't frame it as a lack of character, or education, or any deficiency on their part.
Mike you really hit the nail on the head. Calling people Idiots and morons are exactly what idiots and morons do…the irony of reality.