but if you make a youtube stunt that hurts nobody you can get 20 years in prison and the FAA acts like you besmirched the stellar reputation of the aviation industry.
A plane crash can cause a wildfire.
In general the concept of starting a fire and a crashing small plane are orthogonal concepts. What happened with that plane is not arson at all.
You don't need "exploding balls of fire" to create a disaster.
When's the last time you seen a car light up on fire during an accident? Never because the chances of it happening are basically negligible.