I suggested a model similar to news sites where you provide a name, email (hidden from public of course) and probably one of those "are you a human" questions to avoid form spam. There would still be an option to post anonymously but if they sign in as a guest they would receive ONE email inviting them to sign up to the site.
I understand what you mean. What I fail to understand is which problem it solves.
I think that maintains a low barrier to entry for new visitors while keeping Anonymous Monk intact.
IMO, asking for an email address is a high barrier for many. I don't like to give out my email address just so I can respond to a query. And if I were to get spam in the form of "please, join our site, pretty please with cream on top", I'd likely never return. One question though, how would you know the email address you got actually belongs to the person giving it?