As a young'un (ish) myself, I will be following this! It's exactly what iv been looking for!
Safety wise, yes spreading them out a bit might be worth doing. Or even, turn it on its head, instead of 'don't do x' write 'this is what happens if you DO x' -insert grousum story/picture-
I know when I was a teenager, grousum stuff grabbed my attention more than the standard safety listings. (And remember If it's someone who wants to play with fire,steel and hammers, they are unlikely to be put off by a little gore
Just my take on the matter