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

Perjury

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.

Conspiracy

Is it possible to earn money by writing and self-publishing a Light novel on Amazon Kindle?

No freedom is absolute.

Revealing classified information

And much, much more.

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Child pornography

Freedom of speech does not apply to:

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.

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Fraud

Threats of violence

False advertising

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Trade secrets

Insurrection

Terroristic threats

Why do trans people get so deeply offended when a stranger misgenders them, especially when it's a first encounter? I've been socially transitioned for 4 years and it just feels like a waste of energy to be so hurt by it.

Insider trading

Revenge porn

HIPAA violations

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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.

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.