Making a car difficult to steal

Someone I know was recently accused of shooting a cat that had a GPS collar on it. I saw the tracing of the collar and it was just like the movies. I'll be buying one for my car.

That said, maybe I don't want to know. I don't need a murder charge on top of my problems.
Bad guys stick those to modern mopars, then go get them later. I had a a couple thugs following me around in my Hellcat. Fortunately, I'm aware of my surroundings.