I would (and have) just disguise the kill switch if you are worried about it. Then the thief cannot snoop on your radio signal. You can have it even be a combination of things (radio on + dome light off + fan switch on medium + throttle at 3/4 + passenger seat buckled, car in neutral, brake on/off, left speaker mute, before the car is armed for starting) if you go off the deep end
And a relay (or solid state switch) is much more appropriate than a servo fuse.
Course this lovely dash mounted switch can probably handle the current for any critical circuit in your car (except the starter), maybe it goes with your cars interior?
