I'm going to steal a kid's phone
Why are you going to steal a kid's phone?
Because he was being rude to me.
Regardless of how the kid is acting toward you, you shouldn't steal the kid's phone. You should respect the property of others.
Fuck you. The kid won't learn anything if I don't steal their phone.
Stealing from the kid won't teach them a lesson. They will think stealing is okay which is not. It would be better to talk to their parents about how rude they are instead.