>>>>The payload on something like mine is only a few ounces but there are obviously bigger, more expensive, options. Amazon are supposedly trialling them as delivery vehicles.....
>>>
>>>http://www.dailymail.co.uk/sciencetech/article-2768128/Send-DRONE-doctors-Parcelcopter-fly-medicine-urgent-goods-remote-German-island.html
>>
>>Hmm. I see the DHL version has a payload of 1.2kg.
>>Interesting inset there about the Facebook solar powered drone. Size of a 747 and operating at 60,000 ft....
>
>That seems to be so Facebook can be an ISP in under- (or un-) served areas. Tech courtesy of Solar Impulse (2)?

Sounds likely

>Some time ago Google had a similar idea using balloons: http://en.wikipedia.org/wiki/Project_Loon

Have they given up on that ?

On Dmitry's concerns: there was recently a news item claiming untraced drones had been seen flying over several French nuclear power stations....
The manufacturers of the drone that I've got are now apparently hard-wiring 'no fly zones' into the GPS control....