Two separate things.
Idiots with toy UAVs
These have been around as radio controlled aircraft for ever. Yes there are now more of them, but most of them are over cities where aircraft should not be at low level. Very very few idiots will have them at height. those that do, I refer you back to where I pointed out they are just like birds. Lots of them around but we seem to get by.
Amazon drones flying automated routes in automated drones.
This is new. There is no benefit in making these things fly high, plus the CEO of Amazon will be acutely aware of the potential lawsuit scale if they screw up. I suspect they will be absolutely bulletproof before they ever take to the skies operationally.