Examples like yours are reasons I try to avoid groups of people in general.
My parents would have never allowed me or my sister to act like that.
Mine would have beat my brains out. We sat upright, stayed in our seats, ate our food and talked in normal voices. Any deviance from this behavior got you the look, a second look meant your butt was going to pay either in the restroom or when you got home with a hand, belt or switch.
My parents routinely got compliments on our good behavior in public. My wife and I have received compliments as well on our children’s behavior in restaurants.