Speaking from experience - yes, some students do act like this. But I couldn’t say whether they are the minority or the majority. Most people are type A, so if they think issuing a complaint will help them bump up their grade, why wouldn’t they? I would not say it is 100% the fault of the students, because Harvard definitely allows this kind of behavior. The median grade at Harvard is an A-, so if that doesn’t tell you about the grade inflation here, I don’t know what will. (But as a current student, I’m not complaining)