The "you're stupid" above is indeed a mild ad hominem and could have been rephrased.
No, it literally is not an ad hominem in absolutely any sense whatsoever, period. If you think otherwise, you may or may not be stupid, but you're definitely ignorant. I could have phrased it some other way, if I were trying to be dishonest, but that is not what I do. I'm not here to be nice about shit ideas which ennoble or enrich shit people, nor to coddle their enablers.
Ad hominem means insult from a person. It is an argument that an argument is false because a certain person made it. It literally does not matter whether an insult is involved, although it can be. The fact that you're issued moderation points for a site like Slashdot when you're so eager to be so fundamentally wrong about what something means is utterly pathetic. This is exactly why moderation should be public, so people can know whether it means anything, or it was executed by someone who has no fucking idea what they're on about. This is also why moderation is and always has been fundamentally broken on Slashdot. Posting and moderating in the same discussion isn't allowed, but the people who are most qualified to moderate are also the people who are most qualified to comment.
I also note that you failed to understand the part about comments whose sole purpose is to insult and enrage, with your comical focus on insult when that is not even the core of what ad hominem even is. It's especially amusing that you quoted that section in light of your inability to understand either thing.
Now go away, or I shall taunt you a second time.