Anyhow I live in an affluent community and always have lights lying around and shouldn't have had to worry about this at a dealer....
Are you kidding me? I'm sorry but in this Day & Age, you really should know better. Don't get me wrong, no one should have to worry about their things getting stolen. But we all know it happens. Even in the affluent or wealthy neighborhoods. Chances are, the mechanics at that dealership are not affluent. You leave something expensive lying around, even a good man is going to feel tempted.
But even with folks who make tons of money, some of them are thieves too! When I've left my car overnight to be serviced, I don't leave anything inside that I would mind if it disappeared. When I travel by plane, I never put anything in my checked luggage that some Luggage-handler would enjoy keeping for themselves. It's not that I think most folks are thieves. It's just, why take the chance?