If you live in one of these high-theft areas, you can still use security via obscurity. Put a rag between your intake and air filter, or remove a critical relay (fuel pump, starter) or unclip a critical sensor (crank, cam, etc.) if it's easily accessible. Or do all 3. Each takes about one minute.
For ease of use, you could also hide a fuel pump switch inside the car that you have to press before going. It's an easy but effective solution for protecting your car and needs basic tools / wires.
Of course, the important thing is making sure the wiring is well done (proper wire gauge) and the switch is actually in a hidden spot.
I installed a reed switch just under my windshield to unlock the doors. Swiping a magnet is easier than keeping a key in my pocket.
Getting myself locked out is more of a concern than a stranger noticing the switch and finding a magnet.
I'll even mention it on the internet, if any of you want to steal my car, please just fill up the gas and return it after. Thanks.
