Wow. This is like a record on repeat.
Its not a bank, i've not got a helmet. Where does the gun come into this analogy?
I agree with you, which is why I'd take my custom elsewhere and let them know I don't appreciate being treated as a potential theif due to car lighting or not closing a door.
It was an analogy, thats the point. Just because you're waving a gun about in a bank doesnt mean you're going to rob it, but most people who do so will rob it.... Just like a large proportion of people who leave doors open will end up nicking fuel - especially when combined with other things, such as parking at a far pump when closer ones are free etc
As for saying it doesnt prevent theft - of course it does. Any normal human being (yourself excluded, obviously) would understand the above principal and close the door when asked. A thief wouldnt, they would give up and drive away