Make shift kill switch?

I leave my car unlocked wherever I go, sometimes with the windows down. I'd rather allow someone to rummage thru it and find nothing, than to first break a window.
If someone really wants it, they'll take it.
but for opportunists, there at least 4 anti-thefts on it.
One of them has already been mentioned right here on FABO, namely; that my ignition coil is mounted on the apron by the passenger side shock-tower, with a coil wire that needs to be about 30 inches long.