"Adults" at Dinner

On the first night of our cruise, one of the guys with us (who is 34 fucking years old) decided it would be fun/funny to throw bread at a different wedding guest at a different table during dinner. That shit's not cool, so I made him pick it up in front of everyone,  because 1) That's not how adults act at a nice dinner with cloth napkins, and 2) the wait staff will have to pick that shit up and let's not make their thankless job any worse by being assholes. Cheers and laughs and applause.
On the 6th night of our cruise, a groomsman comes to my table and hands me a chunk of bread and says that Guest A is throwing bread again. I stand up, breaking the bread into 2 little pieces as I do, and go over to the bread thrower. He's wearing a hat, so I take it off his head, put a piece of bread in it, and put it back on his head. "This is for being a child and throwing bread, again." Laughs and applause. I then go to the groomsman and do the same to him. "This is for tattling." More laughs and applause.
Morals of the story?
1. Public shaming is an acceptable form of punishment, and fun at any age
2. Snitches get stitches
3. Too bad I don't want kids, or else I'd make a decent parent.