The more I watch, read about this I can't understand why vehicles such as cars don't have a little red button like my lawnmower and my valk to handle this problem. Seems to me alot of life and $ would have been saved if all cars had kill switches. Maybe someone should ask our crongessmen who don't seem to understand what the heck is happening.
I think its called the key!
I dont know anyone that has used the 'red button' on a bike in accident. To me clutch and brake are more of a priority.

If I turn the key all the way off in my Jeep the steering locks, I was thinking more of a switch on the steering wheel that cuts the power, something like the radio controls they have on some car steering wheels. Might be a problem though when someone hits it by accident while traveling done the road.