Albus nodded along. He understood the reasoning, even agreed with it in a sense. There was a reason he'd decided to follow a path into teaching, and it was to keep clear of any such arching decisions. No, that was better left to people like Regulus Black.
Still, that did not mean he couldn't enjoy a good debate when it arrived.
"In the case of the killing curse, it could be argued that banning the act and the spell are one and the same," he put forward, his tone still simply thoughtful. "Surely you cannot tell people not to kill, but allow them to use the spell that exists for that one purpose."
Albus hesitated, unsure for a moment what he was about to say to the sincere question that had landed in his lap. But there were books in the library which gave out certain information freely. Perhaps a watered down version...
"My Father was sent to Azkaban for murdering muggles," he said, almost matter of factly. "Perhaps that is why I find such things... unpleasant. But as for education.. well, I cant speak for my older self, but personally, I think teenagers are quite capable of being cruel and causing damage without knowing dark arts. If anyone wishes to extend their knowledge after they leave Hogwarts, there are many ways to do so. But I would be reluctant to give such knowledge to those who are underage and perhaps unprepared."
Albus settled back in his chair again from where he'd been leaning forward, stretching long legs out in front of him as he quietly examined Regulus. "Well, we can only hope you will be able to stick to fining people for oversized cauldrons for a while yet," he finally replied, with a pleasant smile. You had to hope the castle had some criteria over who it brought in, after all. A vague thought occured to him.
"Although, that being said, has anyone checked Azkaban since we arrived here?"