I'm not sure if it was mentioned, but sound is not all that fast. Yeah, the jogger may technically hear a whistle, but processing the information correctly and avoiding the speeding plane is an entirely different thing altogether. Not only is this mishaps highly unlikely, but also a whistle is highly unlikely to be a useful warning to a jogger who is wearing headphones and in a Zen state of mind.

By the way, I like the idea of banning planes and joggers. grin