People should not be writing that they are dreading anything lower than an A! It not only makes you seem highly arrogant but also undermines other people's hard work; I know many people who would be over the moon with a B, and you writing that a B is bad makes them feel awful. Please think about other people's feelings before you write your views, I see nothing wrong with aiming high (I do myself) but express your views in a more empathetic way, so you do not make others feel unintelligent and undermine their hard work. If you can not do that don't write anything at all