Wow.  I hope you're being condescending or sarcastic again.  Is it really a referee's job to teach a so-called adult not to assault children?  If the "victim" (your quotation marks, not mine) did throw the first punch, does that justify an adult punching him?  I don't believe so.  But nice of you to cast blame on the kid with zero evidence.  I will agree with you that sportsmanship and general decent behavior is in short supply in many youth sporting events.  And I will say that referees have an opportunity to control the game and the sideline/bleacher behavior, and many don't do this, either because of their age/inexperience/personality.  None of that excuses an adult assaulting a child, however.