There were also some, who were jealous like John Potter since in his belief, he should be the founder’s heir of Gryffindor, but his brother had the titles. So, he was taking his anger out on the girls, because of his jealousy. The teachers noticed this bullying regarding the founders’ heirs and were punishing those responsible adequately, which would anger the students some more, because if headmaster Dumbledore was there, the man would have turned a blind eye, but with Longbottom, it was impossible.