The types of Kites common in Brazil are far less sophisticated than those presented on this wikipedia article, its basically made of 3 or 2 thin, +- 40cm wooden sticks and paper, yet it may impose some risks to aviation as F.O.D but I never heard about any accident caused by a kite here. It seens to me so far that the airplane suffered an engine failure and the pilot probably failed to feather the prop for some reason.