Disconnect battery when parked?

Bennoel 10 said

Lot's of controversy on whether it's a good idea or not to have a kill switch or disconnect switch etc. We have all heard the crazy stories where we ask "how could that happen ". So for me I believe the cost and inconvenience of turning on / off the switch is small compared to losing my cherished old mopar. Just like I have it insured in case something stupid happens. Better to error on the side of caution. You may disagree.

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It can't hurt but I think it's about as close to unnecessary as it gets if you're purely using it to prevent fires when parked.

It takes a short or at least a loose connection that is arcing to start a fire. If it's going to happen, it's going to happen when you're driving 99.9999% of the time. Once the car has stopped and nothing is moving, the odds of a short happening are about .0001% likely. Yes these numbers are all verifiable science :D

But seriously, you'd basically have to have one of the few wires in the car that still has juice it it also have a cut or some bare wire exposed and then that exposed bare wire would somehow have to touch a ground while the car is stationary. If that scenario was going to happen, it's basically going to happen when you're driving and things are vibrating and rattling around.