If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

Freedom of speech does not apply to:

Child pornography

And much, much more.

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Fraud

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Threats of violence

What 10 things have you stopped doing in your life?

Revenge porn

Insider trading

False advertising

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Trade secrets

HIPAA violations

No freedom is absolute.

Are the seasons in Ireland different from those in Scotland, England, and Wales? Or are they just milder versions of each other?

Perjury

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

What is the difference between the terms "Millennials" and "kids"?

Insurrection

Terroristic threats

Revealing classified information

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That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

Conspiracy