I keep mace in all our vehicles as well as other places. Not that I would fight a gun with mace, but most of the punks around here are only armed with their mouths and favorite MMA t-shirt. I actually got close to using it last weekend, but I digress...
As others said, get a fuel-cut switch or, in the meantime, simply pull the fuse for the fuel pump.
SS
____________________________________________________ We face formidable challenges. I am not afraid of them. I am prepared for them.