Mischievousness

noun

1. Capacity to do injury; hurtfulness; noxiousness; disposition to vex, annoy, or tease; roguishness: as, the mischievousness of youth.
2. The characteristic of being mischievous; the tendency to make mischief.
3. the trait of behaving like an imp
4. reckless or malicious behavior that causes discomfort or annoyance in others
5. an attribute of mischievous children