My car doesn't have an ignition key, it has a button. If you press the button while in motion, I'm not sure what happens, but I'd bet it would ignore it.
Of course, if the computer is busted, I'm assuming the long button press will be sent to /dev/null.
That is what sucks about cars with power steering, they don't get any of the benefit a car built with no power steering does.
Getting that boat of a minivan around the next corner in traffic was both entertaining, dangerous, and probably the best upper-body workout I got that year.