I have resisted my comments, so i will keep them positive, I hope!!
The full scale guy flew his damaged aircraft back to his home airport with known damage when he was right over an airport, Where he could have landed safely but with lots of imbarrasement I would think. NTSB involvement, probility not. FAA investagation will be small due to the $ value of the damage to the aircraft.
R/C demos at a private airport, the AMA has no control over. I would think if you were flyin over the edge of the runway you would be over the airpark homes or over the crowd and parked airplanes. not a lot of room for error.

My comments made as a R/Cer AMA CD, Licensed Pilot, airpark home owner and FAA Designee
Now lets go flying and do it SAFELY.....