TOO LATE

I should probably explain this one since it's not really that clear.

 

The reason for the warning signs is that there is a low brick wall located right where I took the picture. So... if you were to back up and either not see the wall or forget about the wall, you would EASILY hit it and do damage to your car. I'm guessing that many of their customers had done just that because of the warning signs. I should have taken a picture of the wall, but didn't. Maybe next time. Hope that answers some of your questions.

Done