That account was banned a long time ago for posting tons of comments violating the site guidelines. Obviously we ban any account that does that. We wouldn't be moderators if we didn't.
Banned users' comments get killed automatically. We often unkill good comments posted by banned accounts. I've unkilled that one.
If you see a comment that shouldn't be [dead], click on its timestamp to go to its page, then click 'vouch' at the top. (There's a small karma threshold before those links appear.) You can also email us at hn@ycombinator.com to point out a comment that needs to be unkilled. Complaining off-topically in the thread does nothing but add noise, so please don't do that.
Banned users' comments get killed automatically. We often unkill good comments posted by banned accounts. I've unkilled that one.
If you see a comment that shouldn't be [dead], click on its timestamp to go to its page, then click 'vouch' at the top. (There's a small karma threshold before those links appear.) You can also email us at hn@ycombinator.com to point out a comment that needs to be unkilled. Complaining off-topically in the thread does nothing but add noise, so please don't do that.