Of course it's a foolish risk to take, but consider:
Is it really government's job to remove risk from your life?
It's foolish to ride a motorcycle without a helmet. Is it government's job to force one on you?
It's foolish to smoke tobacco. Is it really government's job to deny it to you?
It's foolish to eat too much and exercise too little. Is it really government's job to force it on you?
It's foolish to jump off a tall building, hoping your parachute has time to open and you don't get blown into the side of the building. Is it government's job to stop you?
It's foolish to build and drive increasingly powerful cars, hoping to become the latest land speed record holder. Is it government's job to prevent you from trying?
You will get fined for not wearing a helmet.
You will get arrested if you try to jump off a tall building, with or without a parachute.
The government does regulate who can buy tobacco, so Tobacco companies can't hook kids.
The government does regulate what kind of cars are "Street legal".
So we've already crossed many of the lines that Libertarian Children think should be there, and we are better off for it.