Accountability

I was at the zoo yesterday with K and he was playing on a makeshift spiderweb. He was talking to another little boy and I have no idea what was said but they were getting ready to playfight. I said in a very loud voice, "No, Kane ! That is unacceptable !" The other child looked around at me and I said to him "You need to learn some manners." I looked around to see where his parents were and there was no-one around. I understand the need to let our children play unencumbered by us, but lets have some accountability when it comes to teaching children how to play. I should not have been the one to stop the two of them, his parents should have been close enough to intervene also.