Ah but your missing the issue at hand. The problem is when the electronics allow the pedal to think its at WOT the brakes are ineffective and some have stated that the cars cannot be shifted into neutral or turned off.
Remember even if those methods DO work your average modern day Toyota driver that is not familiar with car like this community is and may not be able to think clearly in a panic situation like that, (some shifters are not just push up into neutral anymore either) and by the time they do they are already 100+ mph. On the push button start cars, if they will turn off, the button needs to be held for at least 3 secs, most people will not hold that for 3 secs at high speeds.
The 4 that died in Cali the driver was a police officer, I mean of all people you would think he would know how to safely disable a vehicle.?