I’m a gun-owning full pro-2A believer and I absolutely disagree with killing someone over stealing a catalytic converter. For fuck’s sake, prison or murder cannot be the only two options here.
Heard a story of a man who was under a car, cutting out a converter when the owner snuck up on him and smashed the butt end of a rifle right into the thieves balls. The man ended up losing both his testicles. No charges were filed. I like it. Perhaps another price should be your balls cutt off with a sawzall.
What's being discussed here is not a revenge killing, you catch someone doing it you're probably not going to gun them down, you're more likely to detain, call police and press charges, or chase them off. But if they come at you with their hacksaw...
I think the proper solution to this is that car manufacturers should be required to better secure these things. Putting a thousand dollars or more in such an easy to access place, requiring people to have some of their money sitting there like that, might as well tie a bow around it and set it on the hood.