Wow! I feel your frustration and experience similar interactions just about every time I take my kids to a public play area. Sometimes I watch those parents who are sitting on the sidelines and actually feel envious of their ability to detach themselves from the impact their children are having on those around them. Most of the time, however, I resent the fact that I am distracted from my own children as I deal with theirs. I spend a ton of energy interacting with my kids, no matter what the setting, and attempting to teach them good and positive etiquette as they play with and around others. My husband simply ignores the unchaperoned tikes around us but I have to admit that I rarely refrain from gently and firmly letting them know when their behavior is off base. One hopes that bossing other people's kids around once in awhile helps me be slightly less bossy towards my own....