Instead of panicking about drones above 120 meters give drone operators their own air corridor with permitted entry/exit points.
High enough for doing autonomous waypoint flying without the risks of hitting something and for flying in the clouds.
That's all we really want, a safe piece of airspace to bring in the new age in drone technology and have fun.
eg, 700 - 800meters would be a good block
The great thing about the drones industry is we can rapidly build new technology for location monitoring and crash avoidance in models..
Give us the airspace and we will build the infrastructure for model flyers to use it safely
Building a simple RC transponder that idents the models GPS co-ordinates to other nearby models for automatic crash avoidance is not hard.
It's a $5 arduino, a $20 GPS receiver and a $2 433mhz transceiver.