Patroclus raised his hand,
"Sir, I think it's a tad hard to categorise Dark Magic, or Dark Wizard sometimes." Unsure as to whether he was structuring his response properly, the boy tried to rephrase, "What I mean is, all magic can be used to an evil or Dark effect, as Josh said, it all comes down to intentions. A simple spell such as Wingardium Leviosa, could be seen as as Dark Magic, if being used for Dark Purposes, such as torture or somethng along those lines."
Talking heed of the next question, Patroclus continued, "So in my opinion it's hard to say someone is a Dark Wizard, based soley on the evidence that they have created a spell that is used in an evil way."

It may have just been his up bringing, but Patroclus tried to see the good in everyone.