I can only speak from experience when I was teased by kids and one decided to shove me down and call me a retarded freak. The shoving person was a bully, the others just kids being kids. I agree that teasing in itself cannot be considered bullying and be punishable under the same standards. There is several degrees of teasing. It is difficult sometimes to determine if teasing is from attention getting, ignorance, or outright hate.Same with physical actions I consider bullying.