Do you think I should threaten this obnoxious kid I know?
Why would you even consider threatening a child?
He's been making my neighbors angry with his awful high pitched shouts
You shouldn't threaten a child. You should instead talk to their parents about their behavior.
I'm only acting, it's not like the little brat will feel terrified and harm himself.
Whether the child would be terrified or emotionally harmed depends on his age and disposition. It's not a good idea to assume he would take it the way it was intended. How would you feel if your child came home crying and trembling with fear because some neighbor put the fear of God in him?