If hackers disabled your grandma's home heating as well as her phone line on a day where the temperature was below zero, locked up your car's brakes on the free

If hackers disabled your grandma's home heating as well as her phone line on a day where the temperature was below zero, locked up your car's brakes on the freeway because they discovered the entertainment system was connected to the vehicle bus for some idiotic reason, or found a way to do naughty things to gas pipelines, you might be terrified.