Please don't take HN threads further off topic. If you see an egregious comment, flag it, as requested in https://news.ycombinator.com/newsguidelines.html and explained in https://news.ycombinator.com/newsfaq.html. You're also welcome to email [email protected]. Venting about it here doesn't help; we don't see most of the posts. All it does is lower the signal/noise ratio of a thread even further.

The reason I know about this subthread is that another user flagged the GP comment. Had you added a flag of your own it would have killed it as well.

Maybe you should make the flag button visible.