"We had six mothers in our play group, ten children and one major problem.
The largest boy, a 4-year-old, bit the other children, snatched toys from them, clobbered them with toys, hit and kicked.
The mother of this boy never seemed to see him hurt another child. We remaining five mothers would give one another knowing looks, but not say anything. Soon, whenever the mother of the bully was out of earshot, moms would complain about him, but no one said anything to her face. No one was willing to jeopardize their friendship with the mother or their child's place in the play group."