Lavender snorted, not quite able to hold the reaction back. Getting a silver knife sounded like a great way to end up hurting herself, but it was something to consider. Her mother didn't exactly agree with her daughter's reaction if the warning 'Lav' was any indication.
So, she unraveled from herself, trying to seem more like an actual human being who happened to exist in the world. "Alright, stay away from the Forbidden Forest and keep my not-gum on me at all times." As for being foolish, she didn't expect to go looking for trouble, the problem was the trouble just sort of found her or she turned a corner and there trouble was. "Thank you," she added a moment later just to preempt any motherly intervention or scolding.