Posted this elsewhere before but it's a good story that I like telling.
When I taught in London many years ago I took a school party to Normandy for a week. We did Bayeux, museums, seaside resorts, etc. and spent a day at the D-Day landing grounds and the Arromanches war cemetery. Most of the kids were respectful/awed but two scrotes pissed about in the cemetery so much I sent them back to the car park to wait by the coach. When we all got back they were both upset, one with a swollen cheek and the other with a fat lip. Turns out two of the old French gardeners tending the graves had seen how they'd behaved and followed them out before giving them each a slap. They demanded I go and complain and said they'd tell their parents. I went over to give the gardeners a bottle of Calvados to say thanks.