You would think there would be more instances of that in places with no inspection, but people are generally pretty good about self policing. Even people with little to no mechanical knowledge are generally smart enough to know when a vehicle isn't (at the very least) safe to be on the road. The human species has a pretty strong desire to survive.
I have seen wheels come off of vehicles that came directly from a repair facility. You know... a place where the people are trained to inspect/repair vehicles.