Re: Shouldn't the engines be more of a concern than the windows?
Replace the DSLR with 750gr of C4 or Semtex and you have a whole new attack vector for terrorists.
Drones are one heck of a lot cheaper than RPG's or shoulder launched missiles and far easier to transport around the place. I would not wanted to fly a chopper in Northern Ireland if the IRA had access to drones.
Yes, I'm looking on the doom and gloom side but... would you want to find out that your loved one(s) was/were on a plane that was taken down by a drone? You would rightly want heads of the people who allowed the flying of drones delivered to you on a plate.