A most unfortunate last name for this young man. “Douche”.
His parents will never let this go. My Dad sure wouldn’t have.
He would have brought it up in the future as a family joke told at Thanksgiving. Years from now, they’ll be laughing about it. The story will be retold with everything greatly exaggerated.
I think that will depend on whether their homeowner's insurance pays off on a totally idiotic human-caused loss. It might not, in which case laughing might not be their reaction.
If this idiot son is 21, then the parents are likely in their mid-40's. Not a good time to take a major loss.
Let's hope circumstances allow them to laugh, years from now, as you say.
A few years ago in in Mathews Virginia a man was eradicating weedy vines next to his house and set his house on fire. He was using a propane torch. The firefighters arrived got inside to overhaul the fire and discovered a very large marijuana growing area with lots of marijuana growing. The police were summoned and the man was arrested for cultivating a controlled substance.