That first email is 2,500 words. I'd be really impressed if anyone from Facebook actually read through the entire thing. It's appropriate for a blog post, but not for an email.
You're more likely to get on the front page of hacker news if you can show that FB is aware of the problem but doesn't care to make any changes, which you can do by posting the email exchange. And you're also more likely to get the HN readers interested in an email that's basically a meaty blog post than in a short exchange that goes "Your algorithm sucks and I want my money back. :("