Virginia passed a similar law - though not a misdemeanor - several years ago and it has had no effect.
Probably because the cops don’t enforce it.
Good luck in GA. If the cops don’t enforce it, and people like the woman you note don’t hear about it, nothing will change.
There are a number of highways where it is posted that the left lane is for passing only and it is strictly enforced in KY. It works. Everyone drives in the right lane only except to pass and traffic flows just fine.
On the highways where no such restrictions exist, traffic sucks.