Kill switch or ignition key

[steve 10562cc]

My Mrs has a keyless ignition Nissan just have to have the fob thingy in your pocket/bag. Read some where to keep the fob away from doors and windows and preferably in a metal box to stop low life using some sort of device to read the fob and borrow the car. Not sure if it's true or not but that doesn't seem a very safe to to secure a vehicle. Prefer the old fashioned method 25kgs of snarling teeth it's 1 - 0 to  him up to now.