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No it isn't. Redacting is a form of censorship. Deleting is a form of censorship. So-called 'shadow banning' is a form of volume control.

Free speech is about expressing yourself without impediment or obstacle, it's not about having a guaranteed audience.

When downvotes stop you from posting to the blockchain, you'll have an argument. Until then, it just looks like you're mad that people don't want to listen.