razol, point is not being a stupid (=daft) driver that DRIVES after car gave you clues that it's keyless and running.
point is - SOMEONE ELSE
can get into that car and DRIVE IT AWAY without that "smart" car preventing this.
there are no AGRESSIVE visual and audible clues. 3 low tone beeps? there is no honking, no flashing lights the father you go away from it. 3 beeps, thereafter - it's free for taking and being driven away
trust me one thing - you have PLENTY of elderly drivers that can't hear damn beeps. drivers that are hearing impaired. drivers that are so much involved into cell phone conversations, chat with a pal, any other distrective situation, that will not notice those beeps. plus, in modern environment, there's a bazillion of beeps coming from all over everywhere. those 3 are in no manner different from anything else that beeps.
forever ever will i remember our NINETEEN EIGHTY SIX, YES, Chrysler leBaron. you forgot to turn the headlights off, open the door - pleasant male voice will say "your headlights are on". left car key in the key station? "Please, do not forget your key".
you see, 1986.
what was it, 30 yrs ago? no nav systems, no hybrids, no fancy computers inside. VOICE MESSAGING.
21 commands. my wife is still missing this, and she's driving expensive lexus.
so yeah, nav system will give you all kinds of dumm directions in pure britt accent. you can do voice dialing and commanding. but to say "Please, do not forget to turn off your engine" - oh, that's waaaaay too simple. betcha you'll jump on that power button right away.
and if you still WISH to leave that engine running - well, daah, you are
a dumm, sorry, daft driver.