I know this is kind of a dumb question, but what has happened/will happen to a vehicle that has a wheel wobbling? I see a car or truck periodically where one of the wheels is not rolling straight.
It's not my car! Don't worry!
I just see it every now on other vehicles as I am driving. It concerns me if the other driver's wheel is loose, because that could affect me and everyone else.
Besides the worn bearing or hub it could be loose lugnuts, and yes, it could fall off or collapse and cause a wreck. You are wise to avoid such vehicles on the road, especially on the highway.