Not in this instance, I assume. People flagging too much can result in shadowbanning, but perhaps the mods think that flagging posts that
might host heated political-religious discussion is ok (even if they don't
have such discussion, and even if they are on-topic for HN).
I also don't think there is a way to complain about abusing flags other than emailing the mods; I have no clue about the effectiveness of this complaint.