I once came onto a thread in which I asked a poster why they had posted. But please let me explain: this was the 3rd time the OP had posted about a run in/confrontation they had had with a person in their life. A few posters in the first 2 threads had said: (1) I can see why your frenemy behaved the way they did, or (2) you may have created or exacerbated the problem, or even (3) what could you have done differently. And everytime the OP blew off the advice, or said the dissenters were wrong, just wrong, and her behavior was fine, it was this frenemy.
On the third thread, we are going through a different situation with the frenemy, but the underlying issue is the same. A few people again start to point out what the OP is doing, and the OP lashed into them: it was not OP that is the problem, it is this frenemy! There then came a small rash of posters (including me) who said: Why are you posting? You go through the same thing every time, you react the same way every time, you blow off any attempt to look at your own part in this. What do you want? Validation for your behavior? Obviously you are not going to get it because enough people are not agreeing with you.
The thread was locked shortly after, but I don't think those of us who asked the question were out of line. None of them were snarky, and it was a very valid question, especially because this was the 3rd time.
In terms of reporting, I can say that about half the time I have reported (and I haven't done many) it was about a thread that I had not posted in. When I have reported it has usually been for a specific comment that was outrageously snarky, or when a specific poster was warned and kept right on in the direction they had been heading.
One final comment: all this talk about pets and favoritism, I have no idea what is being discussed. I rarely check the INAH folder, and am more likely to be in the Work or Life In General.