These threads always make me chuckle... It's not IF the technology exists for this to happen, it pretty much exists now.

HOWEVER... If we can't keep China/Iran from hacking our super secret military Intel drones, why would anyone think that we could prevent some random terrorist group from hacking a commercial airliner?

Can you imagine the fallout the first time an airliner with 200+ people on it is hacked and crashed? Unmanned airliners aren't coming anytime soon and IMO single piloted large commercial airliners aren't coming soon either.

With that being said, it probably will happen far into the future, but highly doubtful during my lifetime.