That's up for private companies to determine as they risk finding a balance between alienating their own users either by inaction or too much action. As for fr

That's up for private companies to determine as they risk finding a balance between alienating their own users either by inaction or too much action. As for free speech in public spaces as restricted by the government, the standard comes down to imminent risk of harm. You're not allowed to scream "Fire!" in a public building if there's no fire. Private companies like Twitter and Facebook appear to try to hold themselves to a public standard but private companies are allow any standard they please. If you're in a movie theater and start yelling throughout the movie, the theater isn't restricting your free speech by kicking you out.