I would feel that I entrusted my vehicle to your care and that you are responsible for any losses incurred while it was in your care. Wonder if I can ban you?
Guess not...
So if I brought my truck to your dealership and you provided me a loaner car that I took home and someone came in the middle of the night and stole the wheels I could call you up and tell you to come get your vehicle and I am not responsible for the loss of your wheels and I am not payinig any part of your deductable to get them replaced. This is where our opinions differ because if this were to happen I feel that I would be responsible for the care of your vehicle - even if I didn't have a secure place to store it. I would be responsible to replace your wheels through my insurance and I would be responsible for the deductable because the car was in my care and I would be responsible. Just my opinion but this is how I would treat the situation and I would want to do business with someone that treated me the same way - it is just the right thing to do regardless of insurance or legal small print.
I do see your point, but at the same time I disagree with you. We also have you sign a bunch of legal things that state you are responsible for the rental vehicle and any damage incurred while in your possession.
I don't know if we ever discussed what business you are in, but try to view it as a business owner / manager and if you would be willing to pay out of pocket for a similar situation where damage or theft occurred to another's property through no fault of your own.