The only way that comments you submit have personal information is if you include it. If you do so and want specific comments edited or deleted, I have complete faith the staff at HN will assist with that.

The rules, which you seem to think don't apply to you, for HN include:

"You acknowledge and agree that any questions, comments, suggestions, ideas, feedback or other information about the Site (“Submissions”) provided by you to Y Combinator are non-confidential and Y Combinator will be entitled to the unrestricted use and dissemination of these Submissions for any purpose, without acknowledgment or compensation to you."