I'm still kind of conflicted on this particular case, but if someone yells "fire" in a crowded theater should the theater owner be able to kick them out? What if the fire alarm is going off, but a so-called "expert" is claiming that the fire alarm is just malfunctioning? Should the theater owner be able to silence them? Deep down I think I still believe that free speech should be protected even if it costs lives, but it's getting harder to hold onto this philosophy in recent years. Misinformation and propaganda is a plague that is nearly impossible to beat since it takes an order of magnitude more effort to refute a lie than to spread it. The only ways I can think of to solve this problem are either to restrict free speech or to spend huge resources on teaching the public critical thinking skills and the scientific method. The second option will take decades to work, if it's even possible at all.