Don't we have a duty of care?

The responsible among you will cry
NO, this sort of thing is exactly how high school massacres start
to that I say
BURN RESPONSO-POOF BURN

Sure it's a sad state of affairs when any disgruntled high school student with $100 (or less if he's willing to get the majority of his pipeware from the local public loo) can create his own Flame Thrower. But can't this be seen in a good light?

At least he's in the outdoors, working with his hands.

I say good on you mate, & I look forward to sending you flowers in the major burns ward of your local hospital.