Here in Georgia they just passed a law that states that if more than four cars are behind you and you don't move right you can be ticketed. YEAH!
Unfortunately, it probably won't apply to the Georgia State Patrol car sitting in the left hand land doing just under the speed limit with everyone afraid to pass on the right. ;-)
We have had a similar law here in California for over 30 years. It is not enforced. The California Highway Patrol does not even acknowledge that the law exists.