I know that I would be distracted if I'm flying and someone else is taxing around like a go kart, specially close to my feet. I don't like props hitting me, they cause PAIN and expensive doctor bills! When you shout "landing" Dad and his winged go kart have to get off the runway and give you the right-of-way. Its common sense and courtesy, but unfortunately some people lack both. IMO, Dad should have gone to a large parking lot and there he can practice his taxing skills (less the wing on the airplane).