Freedom of speech was intended to maintain political discourse, not encourage the spouting of nonsense. It restrains the government from silencing its critics, but was enacted in a time where if you slandered me to my face and I beat you to death there was a very good probability that a jury would say "okay, he had that coming," if law enforcement even bothered to ask a jury about it. Our modern world of "oh my, we can't be violent" has allowed free speech to expand into areas in which it was never intended to apply.
Finally, someone else gets it. Freedom of speech just means the government can't suppress your ideas, but a private citizen or corporation should most certainly be allowed to do so (I say that in all seriousness by the way).