Haven't you ever been on a night flight where you had to ask someone to turn down their Samsung phablet from the brightness of indoor landing light? That's roughly the level of inconsideration that is routine on flights, so this passage isn't so extreme as to fall under Poe's law and falls in a gray zone of ambiguity. If they had said Bodysnatcher at full volume for 20 minutes and no one complained, then it would've been absolutely certain to be satire without a doubt. I kind of like the idea of it remaining ambiguous, almost as much as I enjoy appearing to lie while telling people the truth.