Firstly, English is not Joanne's first language. Mandarin is. She's been working on her English ever since I last worked with her in Manhattan, where our product manager was a native Mandarin speaker and provided real-time translation between her and our team.
Secondly, she was unaware that this article was submitted to HN. I sent her a text message congratulating her on making the front page; I can only assume she shared it with her friends as well given her utter surprise. And her friends come from a network of native Chinese. So, (again an educated guess) they probably signed up, not knowing the HN community guidelines, and proceeded to post congratulations as well.
How about we give people the benefit of the doubt before assuming malice.