It is the very definition of censorship.
And one man's "harmful communication" is another woman's useful communication.
Since your comment is egregiously wrong and, in my opinion, harmful, I'm going to delete it so that it doesn't mislead people about the harms of censorship.
See where I'm going with this?
I say my opinion, you present your side, and we can debate, or move on, but we have both had our say (albeit, at varying shades of grey on HackerNews ;)
The notion of "harmful tweets" is a very 2020s phenomenon but the concept goes back thousands of years. There's a reason our Bill of Rights is strongly inspired by Voltaire, Descartes, and other (then) modern thinkers.
"I disagree with what you say, but I will give my life for your right to say it."
It feels as though we've backslid from that ideal.