We have a while before we have to worry about those kids actually getting to college. What needs to happen now is the colleges proclaiming this. Make a big stink about it. Talk about remedial education requirements for Florida graduates. Across lots of states. Embarrass the hell out of the state. Set requirements that Florida public school graduates have to take an entire years worth of remedial education in college. Suddenly mom and dad looking at that bill will start to flip out.
Look at what happened to North Carolina when they tried to pass their bathroom bill, way before all the current crop of anti-trans laws. Stuff got cancelled. Events pulled out. Businesses proclaimed their objections, made public grumblings about risking expansion in the state. There was actual damage and cost, and North Carolina nixed the whole thing. Look at what's happening in the culture wars now. Nothing. It's become noise. Next week Wisconsin will declare an open hunting season on Muslims or something, and everybody will yawn. They've successfully numbed us to this shit, and until large entities start pushing back, until there are real tangible costs to the states pulling this shit, it will keep happening.