I think of it this way…
We trust other people all the time. Trust them not to rear-end us if we pull out when it’s a little too close to call. We trust the cabby not to drive off a bridge. We trust the chef didn’t poison our food, and we trust the people around us aren’t intent on doing us harm.
Now when it comes to gun free zones, I’d like to trust that everyone is obeying that law, but we know it’s not that simple. I prefer to trust myself.