I actually spoke with one of the people at HN and suggested they implement a feature which lets you disassociate a post or comment from the author. I think this

I actually spoke with one of the people at HN and suggested they implement a feature which lets you disassociate a post or comment from the author. I think this is very similar to how reddit handles it when you delete an account. All the posts/comments stay in place, but the author name of each item changes from "Bobsmith33" to "deleted user" - Seems like a great compromise for HN. Good (and bad) content remains, but the association factor is removed.