Completely Oblivious
I once caught two kids (around 12 years old) about to throw a coke can at an old woman from across the street. I got in the way and yelled at them to “try it and see what happens”. They stopped in their tracks and tried to deny what they were about to do. Afterward, I felt bad and thought maybe I’d overreacted and could have used less threatening language towards two kids, it’s probably the only way I was gonna get through to them. The old lady was completely oblivious to the whole thing.
Story credit: Reddit