Flagging bots and users who flag inappropriately don't have much effect here. We review flagged posts, and for any account that is flagging inappropriately, their flags get switched off.
Almost every day the accusation is made that anything critical of the U.S. administration or tech celebrities is censored here. And the response is always the same. This stuff gets flagged, correctly, by users who want HN to stay true to its intended purpose, which is to discuss topics that engage intellectual curiosity.
The day-to-day posts criticizing the U.S. administration or tech celebrities normally don't fit this category, because they generally say the same thing as the version was posted the day before, and the comments in the discussions also say largely the same things.
Still, we frequently turn off flags on politics-related posts, or indeed posts about tech celebrities, when they contain "significant new information" and can sustain a discussion thread that contains new ideas in the comments.
The users who keep complaining that these stories are censored are users who seem to want HN to be something other than what it has always been intended to be.