Out of curiosity, why do you want it off? I see nothing but a safety benefit.. you get into an accident and it calls 911 for you. If I'm unconscious, why would I not want to notify the police/ambulance immediately..
And, at least on mine, I turn it off and it will turn itself back on after a couple of days. I have to go back in and turn it off again! I've been doing this for 3 years now. It's NOT a safety feature, as far as I'm concerned, just more of big brother meddling in my life. Don't want it and don't need it.