Use a green wire from the negative side of the primary on the coil and run it to the back of the cigarette lighter in place of the hot lead. When you push the lighter in, it completes the ground circuit bypassing your points (like your points are permanently closed). The green wire looks like a tach signal lead, so no one will be the wiser.
So the thief pops the hood, hooks a hot lead to the coil and jumps the solenoid. The car cranks and cranks till he kills the battery, or you hear the car cranking, and "assist" him away from your car.
If you all ready have a tach lead going to the negative of the coil, then just tap into the tach lead under the dash. Does the same thing.
Don't do this with an MSD box.