My concern was simply being held liable if something were to happen with the brakes due to the rotor thickness since I would be the last one who touched it by putting brake pads on. As a state safety inspector, I know that the rotors in themselves do not pass the state requirements, but since it was not in for a state inspection and just a pad slap, I didn't want to be held accountable for something done against my recommendations. A mechanic recently was arrested and charged for inspecting a vehicle and passing it and then having the lines blow out not too long after causing the death of the car owner.
http://www.wptz.com/news/dmv-mechanic-charged-with-manslaughter-in-drivers-death/34659076
Being a mechanic is not exactly a great life, we have multiple tens of thousands of dollars we had to invest into tools, get paid by an often abused pay system and have a negative reputation associated with our career, much as lawyers do. I don't need to also risk my family's financial security for a random person either.