"Smug" is exactly the tone of the first few panels. It's the same "I am so much smarter than my teachers at school" tone you'll see in the forums on xkcd in general - especially on this comic. And of course, it's not like Randall is new to this smug tone regarding high school in general. If they are having a "who can imitate Holden Caulfield the best" contest, they are all winning.
(though I do appreciate the fact that this comic is leading people to say things like "This comic is funny because it is funny" because that is exactly how inane they always sound! )
Anyway, like most I-am-superior-to-everyone-who-has-authority-over-me screeds, this one has to bend the truth quite hard. Basically, Randall is stacking the deck in his own favor. Honor societies are not for people who are "honorable," they are for people who get good grades. You join them to show colleges that you are smart. Perhaps that's a bit redundant if colleges are going to see your grades directly, but that's a different question. I tried to get into an honor society in high school, and failed, but not because I am dishonorable; that was not a consideration. It was because my grades weren't good enough (I am a pretty dumb guy). That's all! Does Randall really not know this? More importantly, does Randall really think the Anonymous Administrator in panel 1 wouldn't know this? Of course not. But he has to ignore it if the character is going to get to make his biting and sarcastic comment in panel 2.
That clever boy. He sure showed the administration! He sure saw through all that bullshit. they are all a bunch of phonies anyway, huh? And look at all the effort he goes to to mock them, starting his own club. See, he's not lazy, he's just putting effort into subversive rebellious things like school groups. The girls should be flocking to him any second now!
Also, jokes about "If x people join this facebook group" ? Those were what, 2007? Nice.
I can't help but enjoy the final line of today's Natalie Dee, especially given that the two authors are not fans of each other.