I don't think this would work very well. It would prevent people from expressing legitimate concerns about your altcoin.
1) there are moderated threads where OPs remove all unwanted messages.
2) people can create own topic in the altcoin discussion section and discuss it without moderation
in brief, this is like moderated thread but saves more time because you don't need to watch your thread 24/7 and remove BS. you just need to ban fudders let's say once a day.
we have free speech.
we have moderated threads = censorship
it tells you when a thread is moderated, so participating is your choice (or not), you are free to choose.