The friend's policy would also be surcharged because the policy paid for the damage on behalf of "an insured."
It would be on the friend's CLUE report so changing insurance companies isn't likely to help.
Again, as an agent who has written thousands of auto policies, this isn't correct. Yes, its on the CLUE report, but that by itself doesn't matter. The agent simply explains it was a different driver (may need documentation sometimes). Accidents are rated to drivers, not cars.
It does make it messy when you have a series of these things, same as when a person with an accident moves out of household onto their own policy. The original policy (household) still shows the incident, but the surcharge is moved to the new household.