Probably one of the automatic spam detector in HN, sometimes they have false positives. Try vouching the comments if they are good. (If that doesn't work after a while, you also can send and email to [email protected] so dang/tomhow can take a look.)

Weird indeed. Several comments of his are dead.

Zeruxe: in case you are unfamiliar, this means most people can’t see them, only those who are logged in and have showdead enabled.

huh?