I think Quora handles this better than HN. It gives you the option to be completely anonymous on a case by case basis, reap the benefits/upvotes even when you are anonymous. Most people on HN/Reddit resort to throwaway accounts when they want to be completely anonymous and not tarnish their username, even though that username has no connection to a real world ID.
People/usernames are brands in online discussion, so the way we generally weigh people's opinion is affected by those brands, which is kind of a function of their comment history and any IRL connections. Say, if the username is 'pg', even if it's a hit-and-run comment with not much thought put into it, you view it differently.
As said earlier, identities is quite important to many users. Quora has done it quite well.
However, with the anonymous feature to ask question, I have seen a rapid degradation of the quality of questions coming on Quora.
I am not the only one who has felt this way. We can find a lot of people complaining about the quality of questions of late.
People/usernames are brands in online discussion, so the way we generally weigh people's opinion is affected by those brands, which is kind of a function of their comment history and any IRL connections. Say, if the username is 'pg', even if it's a hit-and-run comment with not much thought put into it, you view it differently.