Years ago when my husband rented a car we were surprised that the staff never came outside to look at the car with us before we drove it off the lot. There was a small crack in the windshield that we didn't notice. When we brought it back they tried to charge us for it and showed us pictures of the car "before" the crack ... pictures that certainly weren't taken the day we rented the car, which my husband pointed out to them.
They dropped it.
Yes, that is fraud and unfair business practice. But it is NOT discouraged in the business community. Acceptable business practices are “anything you can get away with to make a buck” including fraud.