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And note that HN does not allow you to delete your comments after a short time passes.

If you contact them and ask for your data to be deleted, they will directly refuse.

Yes it would break things. Also it's impossible to delete things from the internet, so a bit cute to attempt to do it...

The comment text could be replaced with (deleted), and the poster name could be as well.

And while other sites mirroring HN might keep the original, that’s a separate issue.