Remember when Hagrid said that all bad wizards and witches came through Hogwarts’ Slytherin house? It made for a nice sound bite, but it’s far from the truth. In fact, two of the most morally corrupt characters in the series came from other houses – though they did put the Sorting Hat into a bit of a quandary. According to Pottermore, and an interview J.K. Rowling gave to The Guardian, Peter Pettigrew and Gilderoy Lockhart both gave the all-knowing magical hat a run for its money, as they possessed a range of traits. Ultimately, the Hat placed Pettigrew in Gryffindor and Lockhart in Ravenclaw.

Of course, they both went on to make some truly awful, selfish, and sometimes deadly decisions as adults. Lockhart became a Wizarding world celebrity by using and abusing other wizards and their skills. Pettigrew palled around with the Marauders in his day, and then became a turncoat and was directly responsible for James and Lily Potter's deaths.That goes to show that even though they both demonstrated some Slytherin-esque tendencies, Salazar’s house wasn’t the only breeding ground for bad intentions at Hogwarts.