The idea that there's something unusual about this is pretty silly. Businesses track the reputations of other businesses all the time. There's never any transparency in those lists, and people that fall on the wrong side of those lists never have any recourse.
Really, what we're arguing about here is the simple concept of "reputation". It's tough for message board nerds like us to hear this, but reputation in the real world is powerful, and it's not tracked in public Bugzillas. Ironically, the only upsetting thing that has happened here is that YC took the time to tell you about what they're doing.