Why not have HN save it so I can find it even if I'm not using my personal browser. Isn't that part of the reason why we have accounts on HN, so we don't have to save everything on our personal systems ... so we can rely on HN remember things about/for us?
Why not save it on Delicious, so you don't have to use your personal browser and HN doesn't get feature bloat?
This sounds like feature bloat to me. Next thing you'll want is a friend and foe system, and all other reddit features...
Or you could use one of the hundreds of online bookmarking applications like http://del.icio.us