[farmerstan]

You can’t delete your comments after 2 hours.

[tomhoward]

You can have any problematic comments anonymised or removed by emailing the hn@yc address.

By default, it's an important part of HN that comments stay up, unless they will cause problems for the poster. PG explained why, many years ago:

https://news.ycombinator.com/item?id=6813226