Having moved from South Florida to NC roughly a year ago, I think that I know why some of this backlash is happening.
I lived in NFLA for many, many years and never, ever saw some of the crap that goes on in the southern sections of the state.
IN SFLA, there's a HUGE problem with bikers.
Primarily sport bike riders, but I saw more idiot cruiser riders than I'd care to admit.
I lived about two miles from FL-27, in a town called Weston. Every Friday and Saturday night sporties would race that road. The local cops are legally obligated to end a pursuit if it exceeds 90mph... There are numerous documented cases of sportbikers "cutting off" cages and causing accidents. In SFLA, if an accident leaves the pavement, in many cases the vehicles end up in one of the many canals and result in fatalities. Very little can be done because the bikers race away at high speeds and no one can legally pursue them.
I believe the idea behind the proposed law is to get the "problem bikers" off of the road.
As much I don't like traffic laws targeted a motorcycle riders... responsible riders will never be impacted by this proposed law.