I will not wear denim trousers and a shirt to class rather than my uniform robes.
I will not replace all the puddings at dinner with sherbet lemons, even if it is in memory of Headmaster Dumbledore.
I will not attempt to convince my best friends that Death came to me in a dream and he really likes classical music and alternative rock.
I will not inform Professor Trelawney that while I did manage to die, it was in a manner completely unpredicted by her or any other 'seer'.
I will not convince students to write the Ministry and various newpapers saying that Umbridge could control dementors because she had no soul to begin with.
I will not set up a black market of brightly coloured parchments and inks. I will also not sell colours that clash violently to the same person.
I will not charm Sickles and Galleons to look bronze.
I will not charm owls to glow in the dark.
I will not sell teddy bears to students. I will also not keep a list of any who purchase them in order for future blackmailing and/or teasing purposes.
I will not tell Draco Malfoy that I like his peacocks.
