No worries.
That won't stop me from building! I actually graphed out the 737 layout before any of the airport with the idea that I'd build it as high as possible but still do it at full size. Daring individuals who found their way up to it (dirt stack?) would see it decked out like the one currently parked on the tarmac.
Now that I've built one full-size one, and realizing how shallow the skybox is, I might not put full-size planes in the sky. They might be too big and too low.