As a long-time Quora user, it disappoints me that the content I donate is held ransom in an attempt at "growth hacking".
I don't know if that is their intent, but it's the result.
(Quora does have a setting to hide your name from search engines for this reason though)
You can disallow search engine indexing from your settings under Settings -> Account -> Allow Indexing (disallow) if you're worried about it.
Opening questions from their feed brings up obscured answers.
So please don't try to justify their abhorrent anti-open-web behaviour with would-be privacy assertions.
You got me to go login to Quora after over a year to see what you were so concerned about. Perfectly reasonable, well thought-out comments on respectable topics. I think you're trolling, sir.