You will discover that the child's single day or night of fun, that they 'thought' they could handle, destroyed them.
While being out with close friends, that influence caused them to develop a strong addiction to lead them to a dead end.
Teasing others IS a form of Bullying. So never make fun of someone's child for what they have done.
Remember, it could have been you, because 'There is Nothing New Under the Sun.'