I drove over to this place to have the upholstery fixed on a car I'm hoping to sell and found this sign on the front door:
The guy inside was very nice and helpful. However, I would certainly not want to get on his bad side. He looked like he could most definitely follow through on the warning on the door.
My car will be safe there. I wouldn't mind putting this same warning on my front window, but I don't think my HOA would appreciate that much.