No,Damo,You're wrong !!
The reason why it's legal and above board to keep the 'rolled car's' I.D. is because the whole process revolves around how much of the original car is re-cycled into the 'salvage shell'. In my cases, I re-used around 85 /90% of the original cars parts.................. Therefore,the car is more 'original car' than 'salvage shell' car. Do you understand the distinction ??
Plus,using your ideaology, what if the salvage shell car was itself re-shelled and returned to the road ?? You can't have 2 cars running around,on the same I.D. can you ?? Now THAT is ringing !!
Am I clear ??