To call or not to call... That is the question...

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:

I felt that this was good information.  I'm not a thief, but now I know not to try to rip-off this place.

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.