I'm a naturalized American citizen who figured out what free speech actually means when studying for the civics test. I suggest everyone try it out if only to dispel the popular myth of 'free speech means everyone can say whatever whenever'.
No it doesn’t, you can easily be prevented from speaking in the first place.
Are you talking about cutting people's tongues out, or prior restraint? Because you don't know who to restrain if they haven't already said something. As a consequence of things you've said in the past, or things that you have just said and have not yet been distributed, you can have that distribution limited or prevented.
All of them are consequences.
If your point is causality exists, okay.
If your point is that the 1st amendment is an absolute freedom of speech, you couldn't be more wrong.
And in this case he is being prevented from future speech acts, demonstrating another category of things it doesn't protect you from.