Hmmm, OK that would depend on a few things depending on intent, age and mental health.
Sorry probably not mental health, as anyone in their right mind would not be so bloody stupid.
That said, no retribution will change the past. The fact remains that these fires would not have been as ferocious and deadly if the source of the problem, forest fuel was dealt with effectively.
You just can not have a bucket of petrol open under your BBQ, it just is not safe.