Earlier quoted context omitted.
One thing I absolutely love about online discourse: shit all over someone, then block them. It is something that you don't see with in-person communications - because you really can't just "close off" the discussion to one way. Anyway, I just think that people do things in online discussions that they wouldn't do to someone's face. And that tends to be a bad thing for reasonable discourse.
Another thing you don't quite seen in real life: strangers that record a serendipitous conversation, to later post it for the whole world to see, to point and laugh. The Internet has turned us into sociopaths.
In the thread linked above, I think his reasoning for posting the email is reasonable. I find this similar to what the Apollo dev did when discussing with Reddit people. If he didn't record the conversation or make it public, his words could have been twisted.