This is a great example of a thing that's 99% harmful being 1% very useful. So which should we choose as society, removing the 99% harm or keep the 1% usefulne

This is a great example of a thing that's 99% harmful being 1% very useful. So which should we choose as society, removing the 99% harm or keep the 1% usefulness? Also we should note that the children in this example were 16 and 17 years old, so above the age of many of the suggested restrictions.