GPT:

There are some mentions online of a Y Combinator startup called Bad News, but nothing official or well-documented shows up in public YC lists or press — at least as of the latest searchable sources.

The only place it’s referenced is in a Hacker News thread where someone claimed there was a YC company whose product was a blacklist of employees so other startups wouldn’t hire them, and they said the name was Bad News. But people in that thread couldn’t find any evidence of it, and there aren’t real search results tying that name to an official YC company on YC’s site, their startup directory, or mainstream reports.