"Well," he started cheerfully, "during lunch yesterday, I sent my solicitor a letter detailing what I expected would happen during my detention. As a legal adult you see, Umbridge trying to use a blood-quill with me is tantamount to the illegal use of torture by a ministry official, on a private magical citizen," here he scowled, "If I wasn’t a legal adult, technically she could do almost anything too me - Hogwarts faculty assume all responsibility for magical children who attend Hogwarts, and take on the role of de facto parent, and there are no magical laws against parents using corporal punishment against their children. Yet," he added at Harry’s outraged expression, "By the time we were adults, Granger had sorted that out obviously," he poured himself a coffee, and continued: