Dangerous and illegal'
Meanwhile, the incriminating dossier of "drones behaving badly" grows fatter by the day.
This month, the US Federal Aviation Administration (FAA) reported that drone sightings by pilots had nearly trebled from 238 in 2014, to 650 this year so far.
Some of these drones were being flown at up to 10,000ft (3,050m), pilots reported.
"The FAA wants to send out a clear message that operating drones around airplanes and helicopters is dangerous and illegal," the FAA said in a statement.
"Unauthorised operators may be subject to stiff fines and criminal charges, including possible jail time."
Firefighters in California recently had to ground helicopters meant to douse forest fires because drone owners were flying their craft too close to the scene looking to record some dramatic video.
The US Forest Service was forced to conduct a poster campaign with the strapline: "If you fly, we can't".
And in the UK, the Civil Aviation Authority (CAA) has recorded seven "near misses" between passenger jets and drones, prompting calls for tougher sentences for amateur operators who endanger life.