The same guy who gets into RC airplanes and helis is not the same person who gets into quadcopters. From what I've seen the quadcopter community does not feel like the regular RC community. Very reckless bunch of folks from what I've seen, and they're ruining it for all the other RC folks like me who have flown for 20+ years with no problems.
edit -- found the story: http://www.npr.org/2012/05/23/153308887/fight-over-flame-ret...
And they were right beyond their darkest dreams. Thirty-two thousand road deaths in the US in 2013.
http://www.citylab.com/commute/2014/11/car-emissions-vs-car-...
During the early days, whenever a horse cart came in opposite direction to a car, the car owner was supposed to disassemble the car and hide behind a bush before the horse came near.
We have come a long way :)