Re: [1] – true, though access to it became severely impaired for folks who browse HN posts through RSS readers. Still keeping an eye on the thread, thanks for linking!
Re: [2] – your assumption is 90% correct. There are nuances, but it becomes ridiculous to explain with words. Guest login: username => hnguest; password => goodolyc
Re: [3] – duly noted. Another one or two in your camp, and I will absolutely disregard the advice I previously received!