If someone is that big of an idiot who cares what happens to them, one less idiot to worry about.
There is a big difference between knowing and not knowing. Some guy playing around with diesel injectors like they were gasoline units could be deadly so you warn him, he doesnt know any better.
These idiots do know better and are just trying to be cool in their minds. Let them be cool all the way to the emergency room or worse i say.