The author just bared an intensely personal and traumatic experience, that historically, has served as an open door to abuse, doxing, not to mention legal threats and discrimination from future employment, when the post is inevitably connected to her identity.

The three-minute old account making a comment from the peanut gallery did nothing of the sort. The two are not at all equivalent.

Pointing out hypocrisy is not hypocritical. In criticizing anonymously, the commenter is acknowledging that there are reasons to remain anonymous.

Pointing out that the account is new is not meant to invalidate it's commentary. It is meant to demonstrate that it is self-contradicting.