Holy magoly, that is 100% untrue. The truth is the opposite: when there are articles critical of YC companies, we are careful to moderate them less, not more, than we normally would. That's the first principle of HN moderation and was literally the first thing pg said when he was showing me how to moderate the site. I hadn't even had a chance to grab a chair before he blurted it out.
We wouldn't dream of doing anything like what you describe—not because it wouldn't work (though it wouldn't), but because as members of the community ourselves, we wouldn't want to be treated that way.
It's always possible to get an answer to a question about a specific post. It's better to send such things to hn@ycombinator.com because (a) they're off-topic here, and (b) we might not see them otherwise. Please note that phrase specific post. Without specific links, it's harder to clear things up.