CJ,
I always try to be polite: follow closely behind, maybe even flash my lights once. If they still don't move over, I will occasionally pass them on the right lane, though I hate doing that (and prefer not to). We've just got to live with the fact that there are some a**holes on the road. Their seeing the roundel on the rear-view mirror probably does not help. I've had people SPEED UP when I try to pass them on the right to try to keep me from passing them... What can you do?
Juan