I'm guessing they are using microwave communication locally for a more reliable link (than satellite). Since you need twitch responsive communications for take-off and landing.
Once the drone is in the air if it loses communications with the ground then it just either flies it predetermined route or at least flies straight and level until communications are re-established.
The problem here seems to be that people both on the military side and contractor side are cutting tons of corners and we are starting to see the fallout from that here.
I think failure to communicate with ATC (e.g. taking off without permission) is a massive concern. If a traditional pilot did that then they would soon have their licence ripped up, not sure why drone pilots aren't held to the same standard.
you can do everything with these things and get away with it ...and if you do something really genocidally horrible you can always blame "terrorist hackers" or "criminally incompetent" contractors ...bone chilling scary shit (oh, and I can even start to imagine the international situations provoked by doing stupid things with drones outside the USA - "oh, no, it wasn't an act of war against you country, we just had a software bug - now take please take this money for the damages and don't mention anything to the press" :) )
Almost all the contractors I know were in the Air Force, Marines, Navy or Army for some period time. (It's usually very helpful as they still have the necessary clearances and don't need to be sponsored to get one.)
But in context, this is a very small amount of the total set of government contractors, most of which are designers, analysts, aircraft/ship building and maintenance, software developers, among a host of other areas. Only a few have a big hand to play in questionable/Black Ops/mercenary roles.
Why should military pilots be flying them? Lots of them are on non-military missions.
1. Of course there are other, non-military drones out there, but they aren't what we are discussing here.