Maybe we are seeing economic war. I believe it would be relatively simple to develop a device to intercept wireless toyota prius acclerator pedal signals and override them with any desired input. All one would need to do, is to go to random locations in the US, and randomly interfere with Prius accelerator signals. This causes major distrust in Toyota and causes people to support Ford GM etc...
Similar types of things have been going on between airbus and boeing....