She is probably one of the students who has already approached a faculty member to supervise her thesis, even though she doesn't know that faculty member and they don't know her. One of the students who was chastised in the beginning of the class for trying to attend multiple discussion sections.
I don't think I am cut out to take notes on a laptop. It's rather annoying. I like being able to draw arrows and pictures to represent my thoughts. Plus, in a day with 6 hours straight of lecture, my battery can't keep up.
Some people need to brush their teeth. How can you not notice if your breath smells badly enough that it can make me, several feet in front of you, cringe?