[el ess A]

Actually, it's an AWESOME idea. You get the best of both worlds by simply switching keys. Hopefully GM will adapt something similar. They KINDA did something similar on the old ZR-1 Corvettes with the "valet" mode key on the dash, but hopefully they don't do that again.

From the perspective as a submarine veteran, you would treat the TracKey like a missle launch code key. You keep it on a chain around your neck at all times or you put it in a secure safe where only YOU can get to it.