The object of flying the "speed demons" and all other traditional "sport" RC planes is to stay within the confines of the field and to expose the surrounding, neighboring public in the least way possible.
99.9% plus of all the crashes I've ever seen or heard of happen within the confines of the field shortly after the malfunction. Instances of "fly-aways" where the plane turns into an unguided cruise missile are very rare with the typical "sport flyer" RC models.