That's not the effect you're after here. You don't care about any deterrent, or you'd have been scared to drive through Idaho, or anywhere. You're not scared, it doesn't affect you.
What does affect you is that, as a human being, you have a latent killer instinct looking for a way out, so you participate in helping kill people by adding layers of reason or justice to it. It's an issue as old as civilization itself, that's why human sacrifice, gladiatorial combat or public executions are more common than not. In the modern US it's a bit more subtle, but still very real.
You can try denying this to the LR message board, but it will be much harder denying it to yourself for the rest of your life.