And what I'm saying is that you literally can't when you get enough negative karma. I have three HN accounts and two of them have negative karma and can't post without mod approval.

Or it just says: You're posting too fast. Please slow down. Thanks.

Then you must be doing something wrong. I, always, speak my mind. This sometimes backfires karma wise but on the long run i think it was minimal.

It's called having unpopular opinions.

That you're conventional enough to never stand out of the herd says more about you than anything else.