Ask HN: Bug?

7 points by jibiki ↗ HN
http://news.ycombinator.com/threads?id=biohacker42

This guy is generally one of the most insightful commenters on HN. Why do his new comments show up as dead?

6 comments

[ 3.1 ms ] story [ 25.6 ms ] thread
I noticed that as well, and wasn't sure why his comment (in the Iran thread) got [dead]-ed.
I've noticed a number of other non-spammy comments being killed lately for apparently no reason. Granted a lot of them aren't what I would consider excellent comments, but it would be nice to know what criteria is used for killing comments.
Somehow his account got banned, but I'm not sure how. It may be a bug.
Why does yc silently ban users without giving them any notification so that they still continue to post unaware that none of what they write is being shown on the site?
Im not sure, but i think its because if you tell a troll that he was baned its very likely that he would make another account and continue with his previous actions, but if he doesn't know, he'll simply think he is being ignored. Its literally preventing trolls from being fed. Im not sure if HN does that.
Perhaps you can limit algorithmic banning to users under a certain karma or account age?