When I worked a "CAT" or catastrophe 3 week shift in Louisville, Kentucky for hail damage last spring, all these cars had aftermarket immobilizers, basically a small piece of plastic on their keyring, that had to be touched to a module similar to the picture posted at the beginning of this thread. Just a tap from surface to surface allowed the ignition to work.
I guess cars in the ghetto have to have this kind of stuff. (rollseyes)