Perhaps, though I wouldn't put it past him to write that popup message. It reads as childish sniping, is unnecessarily snarky, and it detracts from the core message of the post.

Knowledgeable he may be, but professional he is most certainly not.

Edit: I must admit, however, that I'm interested as to why he was banned. I don't believe he's said/done anything spiteful and mean in HN itself.