Somebody's written "Fuck You" on the wall. It drove me damn near crazy. I thought how Phoebe and all the other little kids would see it, and how they'd wonder what the hell it meant. And then finally some dirty kid would tell them, all cockeyed, naturally, what it meant, and how they'd all think about it and maybe even worry about it for a couple of days. I kept wanting to kill whoever'd written it. I figured it was some perverty bum that'd sneaked in the school late at night to take a leak or something and then wrote it on the wall. I kept picturing myself catching him at it, and how I'd smash his head on the stone steps till he was good and goddam dead and bloody. But I knew, too, I wouldn't have the guts to do it.
Which of the following choices BEST articulates the passage's thematic relevance and importance within the larger scope of the novel?