I'd appreciate it if we could leave the slights and barbs at home. I really think we can have a conversation without.
As for the definition of censorship: https://en.wikipedia.org/wiki/Censorship_in_the_United_State...
First sentence: "In general, censorship in the United States, which involves the suppression of speech or public communication, raises issues of freedom of speech, which is protected by the First Amendment to the United States Constitution". I apologize if my short-hand of "first amendment definition" was misleading - it's not defined in the 1st, but the 1st is definitely the basis of legal handling of censorship.
So now we have two competing wikipedia definitions. Looking at the National Coalition Against Censorship, the first amendment still seems relevant: http://ncac.org/resource/what-is-censorship
I think the case can be made, at least, that there are different definitions of censorship, none obviously invalid.
"If you really think that the truth is a clean thing"
In many cases, no. In many other cases, yes. There are things that are verifiably true or false. I'm not interested - for the purposes of discussing fake news - with the open questions. But for the purpose of experiment #1, I am interested in verifiable falsehoods. The dumb garbage. What if the government could and would sue for that? (N.B.: It's a thought experiment. I'm not advocating for that approach)
I also still think that experiment #2 leads in a better direction. Falsehoods will always exist, but there's nothing that says we need to make it easier to propagate them, under your or my definition.