I already knew this was possible from a report relating to a CIA? attack in which this ability was clearly indicated.
This capability has been convenient for someone simply because it simply does not need to exist.
In fact it is exactly this that one would program to not occur. The natural default should be a collapse back to direct control as a mechanical system. This actually looks shoddy.
Hacker Finds He Can Remotely Kill Car Engines After Breaking Into GPS Tracking Apps
“I can absolutely make a big traffic problem all over the world,” the hacker said.