The tough thing with a drone is the control system, not the actual
vehicle. They are very easy to scale up.
Mythbusters has been using RC car controllers on full sized cars and
trucks for years. I don't think it would be that hard to put a drone
control system
The scary thing about these new groups like ISIS is they are not just
goat herders with automatic weapons. They are recruiting college
educated westerners.
Those virgins they are using as bait must be pretty old and wrinkled by
now.