Earlier quoted context omitted.
I wholeheartedly disagree with this, what you're essentially describing is just watered down identity. The whole point of the value of anonymity is that all posts are equal.
This is unrealistic and won't work in practice. If all posts are equal then all posts are equally worthless. It's a sad but basic truth that we need identity and ability to accumulate reputation to be able to hold a meaningful, informative conversation. If everyone is fully anonymous (in a stateless sense), then everyone is basically a "random internet dude".
Within forum post culture there's a built-in tendency for content to be fast and disposable. This makes identity relatively more valuable, because it allows a stream of posts to be put in context, just like with a book.