Can you remember me the Q drop on that Anon? Have been flying these things for almost 3 decades. Baring the military side of this, airliners just don't fall out of the sky by way of espionage, remote controlling or some other myth. Virtually impossible.  As for the drones through the engines, I would seriously doubt the engine would continue to run, even at idle. The damage just one of those things would do to the 1st and 2nd stage compressor fans would be enormous. Entire engine could come apart. No, you'd be shutting that thing down if it didn't already seize on you to begin with.  Plenty of redundancy in these airliners. Transfer busses would pick up the electrical power from the failed side and electric hydraulic pumps would still be available not to mention the PTU on each HYD. system being able to provide hydraulic power to pressurize the other system.  You'd still have a big problem on your hands.