It's not. They carry a driver's license and law enforcement can reference their name by license plate.
This is how company ownership information should be treated too.
(This is not about the parent comment—I'm just posting a reply here for clarity because the other post is already several days old.)
Another is that I prefer to (try to) persuade users that it's in their interest not to abuse HN. HN is only interesting because there is a somewhat* higher quality of discussion and content here. When you post aggressively, violate the site guidelines, and so on, you're damaging the ecosystem and contributing to destroying HN as an interesting place. That is not in your interest.
I assume that you wouldn't drop a lit match in a dry forest, or dump engine oil in a mountain lake, or throw trash in a park that you enjoy. Why do the equivalent here?
(* I don't want to overstate that—a lot of posts also suck. But it's all relative, and there aren't many places on the internet to have the sort of discussion that, at its best, goes on here.)