I'm not claiming LessWrong is a free speech place, I wouldn't be that surprised if certain topics got deleted.
But I think many 'troubling topics' have been discussed, then the discussion has ended.
People sometimes imply there is lots of 'troubling discourse' on LessWrong, but there just isn't. Go there and search something 'troubling' and there are gonna be hardly any articles on it. Seems untrue.
Seems a much healthier environment that somewhere where 'troubling topics' are endlessly double entendred and so sit below the discourse constantly.
I'm not claiming LessWrong is a free speech place, I wouldn't be that surprised if certain topics got deleted. But I think many 'troubling topics' have been discussed, then the discussion has ended.