This underestimates the strength of a desparate and determined adult, and any kidnapper is going to be VERY desparate and determined.
If locked in a trunk, remove the taillight panel which comes off easily, and disconnect the taillight wires. "Now you increased the odds 50 percent that the police will pull the car over because it has not brake or tail lights," Stuber said, "then they will hear you inside."
50 percent of what? It takes weeks on average for the police to notice. This 50 percent figure is the smoking gun proving the irresponsibility of this advice.
Adults are responsible for not being kidnappers. Children are not responsible for their own kidnapping.
So, what would you tell a female relative of yours - if a desperate and determined rapist comes along, just lie back and take it?!?