That was what the cashier at Staples told us about high school, and why my unschooled daughter should go to high school when she's older. He then proceeded to tell us about the fun one can have in high school. For example, this young man was able to arrange to have fireworks explode on his school roof without getting caught! :O I informed him that my 17 year old son (who wasn't with us at the time) has fun with fireworks too, without attending school. Then he asked would I rather my son be using fireworks at home or school. Oh yeah, go do dangerous things without any guidance and supervision, in places where others could be seriously injured. I quickly answered, "At home."
I believe that the danger in most activities is often relative to one's knowledge of, and experience with that activity. Fireworks are a prime example. Driving a car is another. I see that my own children, having been provided with information and guidance about how to safely pursue the things they're interested in, are able to enjoy the activities they choose without needless risk-taking. Their thrills come from doing what they want, not getting away with things they "shouldn't" be doing. Now that's my idea of fun!