That's just stupid. By the time you place it there, it'll readily combust/oxidise to form CO2 which wont do no one any good.Place a tank which is fulled up with CO and NO2/NO .Fill up ur car with it and leave it at night .The one who steals it will deserve the torturous death .
All you got to do is find CO/NO2/NO
That, and, well, if you were to somehow manage to get CO inside your car and you, or say, your brother decides to take it out for a spin, you could be the victim.
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I'm pretty sure side mirrors stolen isn't worse than the whole thing stolen.the most worrying thing now isn't that the whole car would be stolen but damn bastards take off side mirrors and sh*t, thats even more sh*tty
Regardless, quite annoying. Happening a lot these days.
And those rear quarter windows being broken to steal valuable spotted inside the car. Happened with me twice already. Moral: Never keep stuff that looks like a laptop in the dark in your car. -__-