I got defensive about my 1 year old daughter, but she handled it.
My one year old daughter was playing in the play area at the mall, where she was continuously interrupted by an older boy who'd purposely get in her way. After the third or fourth time, she calmly looked him in the eye, then started to jam her index finger into that same eye. She never broke eye contact with him and was Terminator-like in her focus. As a responsible parent who believes their child should know right from wrong, I let it happen. Don't mess with my kid.