The problem is the terrible elitism of it, for lack of a better word. This comic is just for all the nerds out there who thought they were better than everyone in high school. For all the kids who never played sports and always felt a little left out, who were never friends with the cheerleaders because they spent all of high school programming, the people who always viewed their school authorities with skepticism and so were annoyed at them that they resented having to be in a room with people who gasp! did like the school.
Needless to say, this is a huge proportion of the xkcd audience. People like this guy. Or this guy. Or all the fucking idiots who think that pep rallies are somehow "Orwellian" because that is just dumb as shit.
Listen, stupid people: Just because something is creepy, or just because something is being observed by camera or there are cops watching a certain place, or just because people happen to approve of some sort of authority figure, does not make something Orwellian, nor does it make it necessarily bad. We know that you read 1984, and that's real special, and yeah, there are some things worth worrying about in that context, but that doesn't mean you have to fucking say that every fucking thing you don't like is Orwellian. God damn it all, but you are ruining that word and taking away all its power, so fuck you, you don't know anything.
So yeah, we have lots of fucking losers who thought they were just too damn good for their school and OH NOES had to stand in a room for a while. So we get the Secret Nerd Fantasy Comic, where in the middle of the pep rally, the sarcastic nerds finally get to say what they are thinking, just like they all wished would happen in actual life and which never did, and never will.
And then we have still more problems. The only "stimulus," so to speak, coming from the authority figure (the cheerleader) is "Lakeview High is the best!" That's not even that objectionable! I mean, it would make a little more sense for the sarcastic outrage if it was like some violent chant about beating another school - but she doesn't even mention another school. And to that simple sentiment, the nerds get all aggressive. Really, nerds? You thought that the cheerleader's cheer was meant to be taken literally? As in, she went through all the schools there are and clearly the best one is the one they are in? You can't stand the idea that it is just a saying, a way to get some school spirit and some goddamn pride in the place you have to spend four years? Why the hell do you have to give her a hard time for chanting that?
And then in the last panel, we get the Nerd Vindication. Look at the downtrodden cheerleader. Look at her, having recognized the error of her ways. Yes, you see, all it took was some clever questioning by the nerds to utterly bring down both the School Administrators and the Cool Kids at once. Revenge of the nerds, indeed.
In any case, the "pride in sports teams is utterly random" humor has been done so much better.
As many people pointed out, the extra comma in "why are we having this, rally, again" is utterly egregious, particularly given that Randy claims his comic is about "language."