My prediction is, some day there will be ransomware for Internet connected cars that does stuff like this.

Sad to say, but a scenario like this is probably inevitable.

Hot tip to engineers and regulatory/safety authorities. You fucked up massively when you did not mandate an always ready and easily accessible way for human occupants to shut down the computerized vehicle in an event that it goes rogue. Something as simple as a power switch that cannot be overridden or ignored by software would suffice, and would have made the situation described in the article a complete non-issue.