Comment hating on Facebook gets upvote? Stop the presses.
Maybe I'm misreading you, but it sounds like you believe that upvotes on HN allow you to infer something meaningful about what real, normal people believe. Don't make that mistake. You'll be in for a rude awakening if you do.
I'd disagree too, I know many non-HN people who would be happy to switch to something else but Facebook is the incumbent.
I don't disagree with the idea of a "Anon Login" whatsoever, that is a good idea.