"Draco, listen to me." Harry said, raising his voice. "It doesn't matter how many scoundrels you and your father are able to extract information from. If you pay them they may lie and if you try to curse them, I will have to arrest you. We have activated a Trace on a considerable number of dark magic spells and we will add more. This means that anyone who uses the Dark Arts in Britain will be considered a Death Eater, captured instantly and locked up in Azkaban. Do you want to end up in jail too? Do you want your father, at his age, to go back to Azkaban?"