The correct course of action here is for our leaders to grow a spine and publicly acknowledge this is a problem.
Of course speech should be free until court rules otherwise. How otherwise you expect minority opinion to be safe from majority? It is not free speech if anybody with more power than you may shut you up.
Should he submit a request to have the case reviewed to the DA and ask a judge to allow him to stop you from taking that option?
The courts cannot be expected to individually guide every action (although law enforcement should be cognizant of the types of speech previously ruled to be free or restricted and respect that ruling with penalties for knowingly violating that precedent).
This stuff is complicated and making blanket statements is just silly. _Most_ speech should be protected, but some speech is limited.
In actuality I think society has reached a point where the ability to post something to facebook or youtube is actually a specific form of expression that should be protected as a public institution. That said, spreading dangerous misinformation is not wholly protected by free speech, if you are a weatherman and advise (with malintent) commuters fleeing an incoming storm to take a highway that is known to be dangerous then your speech is not protected, the government may silence your speech and you will likely face legal repercussions for doing so.
I think freedom of speech is very important and I do acknowledge that this issue is littered with slippery slopes but, not all speech is free and there are some forms of speech that should be controlled. The problem of how to do that as a society while not impeding free speech is extremely hard and unsolved, the best current solution might be to assume all speech is free until a court rules otherwise but that is not an ideal solution.