If you see kids starting a fight, cornering someone and they are without their adults (age 8-10) do you intervene and stand up for the kid?
In a broad daylight in a playground full of young children and parents in an affluent area nobody seemed to care to sort out a nasty situation between the boys (5 against 1). During the lecturing that followed it turned out it wasn't a remote incident.
Are adults afraid of confronting this behaviour?!