It's only a prank if it's from the Pranque region of 'Nobody was hurt and everybody involved is laughing'. Otherwise, it's just sparkling bullying.
Madness string 114659
Usually, it is merely randomness. Nonsense. White noise to be filtered out with all the other white noise; meaningless. But sometimes it hits a nerve, it speaks to something meaningful. It startles us out of heart and mind. And then we notice. Then we remember.