Broheim
OK, my bad. It was another server who told the family. Where did he get his info? Must have been from the first server who was "spreading it around".
Still, the family would have suffered no harm except for the wait staff.
And by-the-way, the mother did say that maybe the kid was a little loud at one point (said the adults were louder). It's been my experience that when a parent admits to their kid being a little of anything negative it usually represents a very limited perspective.
And as for the right to refuse service, that is almost universally reserved for management, not wait staff. Management might have handled the whole thing better.