Its potentially legal owner (if it was stolen) may have already been paid out by his insurers. If it's been 'ringed' with any sense, there'd be no trace of the original ID anyway.
It could still have distinguishing features that could identify it. The fact that it appears absolutely no attempt was made to check such things is what I think is wrong.
If the insurance company have paid out on it, then it is their property.
All this just says to me is if your car gets stolen no effort will be made in reuniting you with it.