I don't need one. I live in the country on a private road surrounded by vigilant family who's houses dot it. Only one way in....and one way out....and I have a very large unpleasant German Shepherd in the yard. I'm also armed, and proficient as an active shooter/Vet so, any intruder becomes one of those ducks like you see at the county fair as they attempt to flee down my long road. Bad people will be shot. Survivors will be shot again.
I dunno.....I like it.