Another reason I always keep the seat belt fastened.
In that photo, I just noticed the traffic cone on the other side of the airplane. It can't be more than a few feet from the plane. Did they think someone wasn't going to notice the airplane sitting there and needed a traffic cone to warn them?
Speaking of traffic control, I am noticing how far, far away this thread has gotten from its original topic, not that we have an actual rule against that. It's more of a guideline.