I have a slightly different perspective on this though I agree the posts should not have been removed. Doing so would have protected not Ami, but the poster, especially after it was clear Ami had already seen them. My NF was (is) expert at hurting/manipulating/controlling through words, which disappear into the ether and which he then simply denies, or rearranges, or turns on his victim, all to his advantage. He's like a moving target, a malevolent verbal poltergeist. But once you pin him down with written words and start addressing each element rationally and dispassionately, he loses all power. Because I see him, and I know him, it's not anonymous, as words are here, I can do this, although naturally he avoids writing anything nowadays.
I don't know what has happened to that particular poster in her life and it is clear that she has suffered. But people have a right to protect themselves against anyone seeking to hurt, not help, via these boards. Again, I don't know that this intention existed in this case, but it is true that when hurt was clearly resulting from those posts, there was no positive message, and no attempt to clarify, explain, self-examine, apologize. OK, fine, the cards are on the table, and each person here could then decide how much time and energy they would give that person's words in future. Which was Ami's response, exactly.