Bad law. It invites excessive speeding which will result in more accidents and massive traffic jams. That said, I live in Florida where the left lane is usually occupied by an elderly person going the speed limit or below with a turn signal light on for the last few miles. Think this could be better handled by requiring slower traffic in the right lane and having subjective enforcement by police. Most states already have this, just don’t enforce it.
The solution is to turn on brights, move up close and slide from side to side across the drivers field of view. If that does not resolve the issue, flash the lights.
Bad law. It invites excessive speeding which will result in more accidents and massive traffic jams.
Incidentally, this law applies in many states, which have demonstrated that your alarm is unjustified.