How do you consider that spam? I posted it on my Google+ account, that was the purpose of the HN circle.
Suddenly I come from another planet. I don't get it. I don't consider my twitter timeline to be spam, for example.
I receive a lot emails from HN related stuff. I think that's fair. If I think it isn't useful for me I just delete it, I don't flag anybody we are here to share things.