I always thought a shock sensor will trigger alarm if the glass breaks or sense any other impact while your car is parked? do they have individual sensor for each window like a house?
I saw a police presentation that glass breaker will tend to pick cars that does not have shock sensor (they will hit the glass to see if the warning goes off), if it does beep because sensing of vibration, the thief will more likely pick other cars instead of trying their luck.
but for the OP, if you think alarm will not help and crack head would want to go in anyway, than i guess your best option is moving out there.
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