We were thinking about doing something similar to that last year at our Air Show. We had an open space just big enough for a F-117 Steath Plane. I don't think I have to go any farther about the idea. But sadly we didn't do it because A) to many civilians B) we didn't have any materials to make a sign. But maybe this year.
If civilians believe the joke then I'll see if I can find a F-117 pilot or someone who knows a heck of a lot about the bird to talk about it once or twice.