It's no more popular than Gurren Lagaan or Code Geass, but I still have yet to see any major spoilers for those two series outside of /a/ or Wikipedia.

Are you being daft or intentionally dense? You completely missed what I said about being able to avoid spoilers if you tried hard enough, regardless of popularity. The basis of your argument is that Death Note somehow has some kind of media priority over other shows, something which you levied against Momiji. Inexplicable, to say the least, because there's far more popular animu in the world, but of course, you wouldn't bother to watch any of them.