If I could invent a beatdown approved appliance, I would devise a device that would be attached to the back of a parent's head that would deliver a sharp blow to the mellon in perfect sync with the sound of that parent's child kicking either the back of my airplane seat or a bench at a restaurant. Kids will be kids, but a job as a parent is to stop a child from clanging away and disturbing others. If you cannot somehow get your child under control, I should be allowed to apply consecutive blows to your brain until the damn thing finally jumpstarts.