And as far as privately owned "drones" being a hazard to full scale or commercial aviation?
None there either but search about manned aircraft colliding? Read and you will see that once again, piloted planes are the problem. Maybe we should just ban all aviation just to be truly safe.........................
http://rt.com/news/167888-germany-military-jet-collide/
http://www.huffingtonpost.com/2013/0...n_3367626.html
http://www.usatoday.com/story/news/n...scape/3420605/

Heck, here's the whole search.
http://www.bing.com/search?q=Planes+...Air&FORM=QSRE4