When you think of "dignified" ceremonies, school graduations are one of the first that comes to mind. Everybody, including the kid who would eat swiss rolls of the cafeteria floor for a dollar, dresses up in strange gowns and minds their manners for an hour or so, out of respect for the belief that educating oneself is an important endeavor.
At a graduation parents are quiet. Babies are hushed. Students are equal parts solemn and happy. Aware that they've accomplished much to get here, but equally frightened that they will be thrust into new and challenging scenarios that will force them to use what they learned and apply it practically.
At least, that's what it's supposed to be like. Sure, we might be bored out of our minds sitting at these things, only waiting for them to call our names and give us a brief second of recognition before we walk off stage and go back to whatever scumbaggery we're known for. But we all pretty much understand that we don't behave like animals at graduation ceremonies.