When people come up with junk science it is pretty clear cut. As I said youtube are already silencing people, and they tend to make a mistake often taking down videos that are not telling lies in favor of those that are spouting obvious nonsense. On this forum moderation is done by real humans, but if we follow free speech to the letter then all the porn, adverts, spam and general nut jobs get to stay up? I mean if free speech rules why are we bothering to moderate the forum? Why should youtube be expected to take down material from terrorists? I mean free speech?
As far as I am concerned people posting utter fake science are as good as the terrorists, they want to convince you of an alternative reality which fits their agenda, gives them power over you, allows them to manipulate you and ultimately harm the stupid that believe them. I don't have a problem with genuine scientific debate, but cmon, you are telling me that you have never seen clear cut junk science?
The concept of free speech was conceived to protect people from oppression in the very literal sense. If you were writing that stuff today you would probably talk about freedom of thought, when people were being killed for what religion they preached at some point this was deemed to be a bit much. In the modern age I can put any bullcrap online and reach as many people as there are with access to the internet, it is certainly not the same thing as evidenced by the fact that this forum is moderated, youtube is moderated if you can call the misfiring algorithm a moderator, just about every online discussion platform has and exerts the power to remove stuff. People are once again up in arms about something that a) already happens and b) if we took their view to the extreme then they would still be up in arms but for a different reason.