too much work
bullet to the head at the edge of a ditch — all 3 one at a time
“bullet to the head”
Bullets can get to be expensive for multiple deaths. Rope, on the other hand, is reusable and there are plenty of trees with good, strong branches.
In this case, there are three. The last one gets to watch the other two twist and wiggle on the rope. That is poetic justice!