I simply don't see what is backseat moderating about it. My point was not whether or not the thread was "legal" on VGChartz, but rather why it was needed. I don't think that's a criminal offense. I don't think I should have reported the thread either, in fact I think that would be much worse than actually discussing the thread with the topic creator. Discussion is what this site is for and it's much better to dissect an OP than just report it, especially because he didn't do anything wrong by creating the thread.
Most arguments come from a similar mindset anyways and have the same end result. When you argue with someone you're doing it because you believe your position more than theirs. The end goal of arguing is to have the other party come to the conclusion that they can agree with your position. That's most discussion on this site. And the final result of that agreement is that they don't repeatedly say/post similar comments in the future. So in the end the result is the exact same, they don't post comments that they now view as unnecessary or wrong. What I wrote wasn't that different from any other discussion, it just started with the necessity of the thread as a starting point.
My posts wouldn't have changed that drastically either had I just not questioned how much the thread was needed. It's not like I just kept repeating that and left it at that. I provided a counter-point for the OP which was the backbone of my argument. Had i just kept repeating it nonstop - yes, maybe it would have been a bit douchey. But I basically just repeated it as much as GoOnKid replied, because that was the point we were discussing. I only repeated it because we were discussing the comment, the moment that he stopped replying I didn't interfere with the thread further.
In hindsight it simply would have been better to just cut to the chase and explain why the argument wasn't well thought out, but I just don't think it's harmful enough for a moderation (Not that I'd care about a warning but, the progressive ban system and all).
Yor words in the posts don't reflect that he didn't do anything wrong by creating the thread (in fact, your first line says: "Do we really need a thread on every possible misconception that people may or may not have about Nintendo fans"). The rest of the post implies that it was an unnecessary topic, which is indeed Backseat Moderating (though some refining will be done in the future). However, the post, on its own, wouldn't have warranted a Warning. It was all three of them (including the mention of 'sensitive Nintendo fans') that lead to it.
If you don't feel it was worth a report, that's fine too, but complaining about a thread in a topic has always been frowned upon (whether justified or not). I actually am against that anyway, because if it is bad enough to state that it shouldn't exist (essentially derailing the thread), then it is bad enough to report. If there was nothing wrong with its existence, then it is confusing to see why a discussion about it happened at all.
Hopefully, that makes a little more sense.