Yeah... "no direct physical threat to others". He was just running around like a nut doing insane things and running into people's houses.
No "threat" at all.
As far as "what's the point goes":
A dead burglar discourages the other idiots.
A dead burglar also helps mend your own family, helps them sleep at night, and allows them to feel safe in their own home.
It works for the neighbors too. It feels reassuring after some burglar gets mauled by someone's dog. It helps make a high crime zone feels a little less dangerous.