There are ways to learn control. I work for educational company and I am translating materials for emotional education... and children as young as 6 are taught how to do so.

I thought before making such "mean" (really?) statement. It is crucial to learn to control your response and it's actually easier to do in young age rather then later, when our unhealthy behaviors are deep rooted in the brain.

this is one simple method:
Tucker Turtle technique: helping young children manage their anger - Newark Early Childhood Education | Examiner.com