It's a problem that's serious enough that they could easily snap off a lug bolt. And if you don't really inspect and find it right there when you pick up the car, you might not get them to pay for your whole new hub assembly.
My workaround on this problem is to always take the tires off the car and take them loose to the tire shop. You can do this in 2's or if there's a special deal for 4's, use the spares you have around and/or jackstands.
Never again will I take the whole vehicle in to the tire shop for new tires. They use it as an opportunity to find other things "wrong" with your car: "Oh, you need new brakes and rotors" "Oh, you need a new exhaust" "If you leave without us fixing your brakes, we're going to call the police" etc etc
Ken300D