It's not ok to post cruel things to HN, and I've banned the account. (I wouldn't do this if the account had a normal posting history, but previous comments have also been unsubstantive.)
If you don't want to be banned, you're welcome to email hn@ycombinator.com and give us reason to believe that you'll follow the rules in the future. They're here: https://news.ycombinator.com/newsguidelines.html.
