What does absolute free speech entail though? Can you use a megaphone? Can you broadcast over FM and drown out the 'owners' of that spectrum?
If the answer to #1 is no, how loud are you allowed to yell? Can I do that yelling at night? Does my right to disturb the air end where your eardrums begin?
We really have all kinds of restrictions on speech. For the most part, what we do is restrict the location and mode of speech, and try to blind our judgments on those issues from the content of speech. We have decided this to be the spiritual meaning of 'free speech' - but of course, it is not its literal definition.