Well Patick, I agree that quads may very well kill R/C airplanes. In fact, if there are many more headlines like this one then all R/C will become illegal :

"The Canadian transport minister announced Sunday (10/15/17) a drone recently collided with a commercial aircraft, marking a first in North America."

I have no problems with drones but a big problem with their moronic operators casting a bad light on all of R/C.