How do you react when other people's children do something which you consider to be unacceptable? I was chatting to a friend the other day. Her son's bike had been taken and vandalised by some other (older) boys. She had approached the boy's parents who yelled abuse at her. Where I live there are children who regularly play outside (very safe area- quiet cul de sac) but they never seem to be supervised and I have found myself biting my tongue as I don't think it is safe for a three year old to be playing by themselves without supervision.