Theft-proofing a convertible with no steering lock

I could still hook that car in 45 seconds. Helper jumps out of the cab as I back the truck in, heats the chain with a plumber's torch, then quenches it with liquid nitrogen as I line up the hoist. Whack it with a hammer, the link shatters like glass as I lift the car...he jumps back into the cab, I'm gone. Couple blocks away, stop to strap down the tires on the hoist & slap on tow lights.
Try that here and one or both of you will be sitting on embedded rock salt. :)


But your point is taken. Short of a vault-like building to slow them down nothing is theft-proof.
I doubt that you need the torch, just the N2 should be enough.