If everyone hates censorship so much, why do those “censorship-free” alternative social media sites always fail?

That has nothing to do with social media.

“Censorship-free” social media sites quickly become Nazi bars where people exchange child porn. Normal human beings don’t hang out in Nazi bars with pedophiles.

You have the right to say what you want. You do not have the right to use other people’s stuff for free.

Why does it seem that Quora's "moderators" base their moderations on personal beliefs and views by deleting answers that are only violating their personal feelings?

I hate censorship. That is, I think the government has no place controlling what people say, read, express, or create, except insofar as is necessary to prevent things like terroristic threats, dissemination of classified information, fraud, false advertising, and so on.

Nazis.

The #1 problem people who make and consume child pornography have is connecting the producers with the buyers. Any “censorship-free” network quickly gets overrun with child porn. Classic example: 8kun.

What are 5 ways that can be done by the community to improve the public transport system?

Because you’re confusing two different things.

Child pornographers.

Why do “censorship-free” social media networks always fail? Well, let’s see. Sit down and think. Think really, really hard.

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Are you going to stay on a social media site that’s all photos of babies being raped, Nazis posting graphic descriptions of finishing what Hitler started, and plans for school shootings?

If i let you use my computer network for free, I have the right to tell you you can’t do certain things with it, and I have the right to kick you off. Why? Because it’s my property, not yours.

We don’t have to guess. We know.

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The #3 user? Terrorists. 8kun was used to plan 3 different school shootings in a 6-month period.

So.

If I let you borrow my bike for free, I have the right to tell you you can’t do certain things with it, and I have the right to take it back. Why? Because it’s my property, not yours.

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Who is the #1 user of completely free digital communications networks that let you say absolutely anything? Who most wants that?

Who is the #2 user of completely free digital communications networks that let you say absolutely anything? Who else wants that?

Now, say you’re an ordinary person. You don’t like child porn. You’re not a Nazi. You don’t want to shoot up a school or blow up the White House.

Is having white skin really that attractive?