Two kinds of ideas I would consider harmful to the point of using the force of law to ban them: antivax materials, and the kinds of comments broadcast over media leading up to and during the Rwandan genocide that lead to that genocide taking place.

I could not in good conscience say "the kids who die of preventable illness, their lives are worth it so antivax people can spread misinformation without consequence."

I could not in good conscience say "the Tutsi lives lost were worth protecting the Hutu rights to free speech."

The "force of law" was largely on the side of the Rwandan genocide, so it's a slightly nonsensical example, although some of the broadcasts do satisfy the tight bound of speech that calls for "imminent lawless action" (which is the most recent criteria set by the US Supreme Court).

Aside from that, both of those examples are examples where the harm comes from a specific action (or inaction), rather than the speech itself. If refusing to vaccinate children was treated as criminal neglect and unvaccinated children were forcibly removed from their families, people could talk and talk all they want and it wouldn't matter.

Do you not see that there is a line drawn from speech to action, like in the situation surrounding the Rwandan genocide or in the case of antivaxxers leading to a resurgence in preventable disease?

Like, are you trying to frame this in the sense of, "I can swing my fist toward your face all I want, but so long as I don't actually make contact it's okay"?

I'm trying to understand how you're trying to thread the needle here and am coming up empty-handed.

Speech can counter speech, and action can counter action. If you don't vaccinate your kids, CPS can take them away from you. If you want to write paranoid screeds about how vaccines and fluoridated water are a communist plot to block the pineal gland, that's up to you, buddy. Just know that if you have kids, we're keeping an eye on you, and if their shot cards aren't up to date or you have a doctor buddy forging them, we're gonna take away your kids and throw you in prison for a long, long time--just to make an example of you. This is what happens to tax protesters (like Wesley Snipes) and this is why tax protester conspiracy theories don't really get anywhere despite the absolute lack of any legal authority to stop people from disseminating them.

I mostly agree with you about Rwanda because openly calling for people to commit genocide does cross a threshold that justifies forceful reaction. My point there is that you're appealing to government, which is exactly who in Rwanda was organizing the genocide in the first place. But if you're imagining a UN peacekeeping force being deployed to Rwanda being the censors instead--sure, among many other things they should probably shut down the radio stations. I'm fine with that.

> Do you not see that there is a line drawn from speech to action

The problem is that this argument makes it too easy to misuse the instrument of censorship. You're calling for censorship that's both unnecessary and insufficient to solve the anti-vax problem, using a standard that could be just as easily abused to call for censorship that even you would disagree with.